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Permissible ways to heat up food on Shabbat: Difference between revisions

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# There is a rabbinic prohibition not to return cooked food to a fire on [[Shabbat]] even if the food is fully cooked. Some say that the reason for the prohibition is that it looks like [[cooking]] and some that it is because one may come to stoke the coals. <Ref>   
# There is a rabbinic prohibition not to return cooked food to a fire on [[Shabbat]] even if the food is fully cooked. Some say that the reason for the prohibition is that it looks like [[cooking]] and some that it is because one may come to stoke the coals. <Ref>   
* The Mishnah ([[Shabbat]] 36b) records Beit Hillel’s opinion that one may not return a pot to a Kirah (type of stove meant to hold two pots) on [[Shabbat]] if the Kirah is heated with pressed sesame or wood unless the coals were covered with ashes or removed.  
* The Mishnah ([[Shabbat]] 36b) records Beit Hillel’s opinion that one may not return a pot to a Kirah (type of stove meant to hold two pots) on [[Shabbat]] if the Kirah is heated with pressed sesame or wood unless the coals were covered with ashes or removed.  
* Rashi [[Shabbat]] 36b "lo machzirim" says its "mechzay kimivashel", meaning, that the reason Chazal prohibited placing fully cooked food on the fire on [[Shabbat]] is that it looks like one is [[cooking]] on [[Shabbat]]. Baal HaMoar 16b, Rashba (38b D”H MeKlal) in name of some geonim, Ritva (40b D”H VeAskina), and Ran (17b D”H Bei Rav Ashi) write that the prohibition of [[Hachzara]] is a gezerah of Chazal because it looks like [[cooking]] when one heats up cold food on [[Shabbat]]. Mishna Brurah 253:55 quotes this Ran.
* Rashi [[Shabbat]] 36b "lo machzirim" says its "mechzay kimivashel", meaning, that the reason Chazal prohibited placing fully cooked food on the fire on [[Shabbat]] is that it looks like one is [[cooking]] on [[Shabbat]]. Baal HaMoar 16b, Rashba (38b s.v. MeKlal) in name of some geonim, Ritva (40b s.v. VeAskina), and Ran (17b s.v. Bei Rav Ashi) write that the prohibition of [[Hachzara]] is a gezerah of Chazal because it looks like [[cooking]] when one heats up cold food on [[Shabbat]]. Mishna Brurah 253:55 quotes this Ran.
* Rabbeinu Tam Sefer Hayashar 235 adds that Chazal prohibited it lest a person stoke the coals on [[Shabbat]]. Shaar HaTziyun 235:37 quotes this opinion of the Rabbeinu Tam.  
* Rabbeinu Tam Sefer Hayashar 235 adds that Chazal prohibited it lest a person stoke the coals on [[Shabbat]]. Shaar HaTziyun 235:37 quotes this opinion of the Rabbeinu Tam.  
* The Gemara and Rishonim discuss under what conditions may one return food to the fire. Based on the Rama 253:2, Shemirat [[Shabbat]] KeHilchata 1:18 rules that one may return food to a fire on [[Shabbat]] only under the following conditions: 1) the food is fully cooked, 2) it’s still somewhat hot (see the footnotes to [[#The opinion of the Ran]] about which foods need to be somewhat hot), 3) it was removed with intent be to returned, 4) one kept his hand on it, and 5) the fire is covered. For the slightly variant conditions according to Sephardim, see Yalkut Yosef 253:9.</ref>
* The Gemara and Rishonim discuss under what conditions may one return food to the fire. Based on the Rama 253:2, Shemirat [[Shabbat]] KeHilchata 1:18 rules that one may return food to a fire on [[Shabbat]] only under the following conditions: 1) the food is fully cooked, 2) it’s still somewhat hot (see the footnotes to [[#The opinion of the Ran]] about which foods need to be somewhat hot), 3) it was removed with intent be to returned, 4) one kept his hand on it, and 5) the fire is covered. For the slightly variant conditions according to Sephardim, see Yalkut Yosef 253:9.</ref>
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==Conditions to permit Hachzara==
==Conditions to permit Hachzara==
# Someone who takes food off the fire on [[Shabbat]] may return it under the following conditions:  
# Someone who takes food off the fire on [[Shabbat]] may return it under the following conditions:  
## the food is fully cooked  <ref> S”A 318:4 and Rama 253:2 rule like the Rambam and Tur who hold that unless foods are fully cooked one would violate [[Bishul]] Deoritta, against the Rosh ([[Shabbat]] 3:10-11) and Rashba ([[Shabbat]] 18b) who hold that once food is cooked KeMachal Ben Dursai it’s permissible to cook it even until it’s fully cooked food. Therefore, one may not return to the fire any food that’s not fully cooked otherwise there’s a potential Deoritta violation of [[bishul]]. Accordingly, Biur Halacha 318:4 D”H Shayach writes that even if one is in doubt whether the food is fully cooked or not one may not return the food to the fire. So brings Shemirat [[Shabbat]] KeHilchata 1:18 note 55. </ref>
## the food is fully cooked  <ref> S”A 318:4 and Rama 253:2 rule like the Rambam and Tur who hold that unless foods are fully cooked one would violate [[Bishul]] s.v. Shayach writes that even if one is in doubt whether the food is fully cooked or not one may not return the food to the fire. So brings Shemirat [[Shabbat]] KeHilchata 1:18 note 55. </ref>
## the fire must be covered <ref> S”A 253:2 writes that one may return hot food if the fire is Garuf or Katum. Mishna Brurah 253:81 adds that a similar metal try can be used as a cover of the fire to separate the fir from the pot. Similarly, S”A 253:3 writes that if on [[Shabbat]] morning one finds the food in one’s pot burning, one may remove it from the fire, put an empty pot on the fire and then the pot with food in it on top of the empty pot. Mishna Brurah 253:81 comments that it’s permissible to put the pot back on the fire since there’s an empty pot on the fire making it like Garuf or Katum. Kaf HaChaim 253:11, Sh”t Maharshag 2:50, Sh”t Igrot Moshe 1:93, and Shemirat [[Shabbat]] KeHilchata 1:18 rule that the fire must be covered in order to do [[Hachzara]] (Shemirat [[Shabbat]] KeHilchata (1 note 54 quotes Rabbi Shlomo Zalman as saying that one shouldn’t increase the flame when one puts a cover on top of it). Many poskim including Mishna Brurah 318:91, Shemirat [[Shabbat]] KeHilchata (chapter 1 note 59) in name of Rav Shlomo Zalman, and Sh”t Igrot Moshe 1:93 rule that one may cover the fire on [[Shabbat]] even if the pot is metal against Chazon Ish 37:11 who forbids putting metal on fire where it’ll become 113 degrees. </ref>
## the fire must be covered <ref> S”A 253:2 writes that one may return hot food if the fire is Garuf or Katum. Mishna Brurah 253:81 adds that a similar metal try can be used as a cover of the fire to separate the fir from the pot. Similarly, S”A 253:3 writes that if on [[Shabbat]] morning one finds the food in one’s pot burning, one may remove it from the fire, put an empty pot on the fire and then the pot with food in it on top of the empty pot. Mishna Brurah 253:81 comments that it’s permissible to put the pot back on the fire since there’s an empty pot on the fire making it like Garuf or Katum. Kaf HaChaim 253:11, Sh”t Maharshag 2:50, Sh”t Igrot Moshe 1:93, and Shemirat [[Shabbat]] KeHilchata 1:18 rule that the fire must be covered in order to do [[Hachzara]] (Shemirat [[Shabbat]] KeHilchata (1 note 54 quotes Rabbi Shlomo Zalman as saying that one shouldn’t increase the flame when one puts a cover on top of it). Many poskim including Mishna Brurah 318:91, Shemirat [[Shabbat]] KeHilchata (chapter 1 note 59) in name of Rav Shlomo Zalman, and Sh”t Igrot Moshe 1:93 rule that one may cover the fire on [[Shabbat]] even if the pot is metal against Chazon Ish 37:11 who forbids putting metal on fire where it’ll become 113 degrees. </ref>
## at the time it was removed from the fire, one intends to put it back <ref> Rama 253:2 in name of the Tur rules that one must have intention to return the food to the fire when one takes it off. Shemirat [[Shabbat]] KeHilchata 1:18 agrees. Mishna Brurah 253:56 writes that if one still has the food in one’s hand but didn’t intend to return it to fire, one can be lenient in cases of need. </ref>
## at the time it was removed from the fire, one intends to put it back <ref> Rama 253:2 in name of the Tur rules that one must have intention to return the food to the fire when one takes it off. Shemirat [[Shabbat]] KeHilchata 1:18 agrees. Mishna Brurah 253:56 writes that if one still has the food in one’s hand but didn’t intend to return it to fire, one can be lenient in cases of need. </ref>
## According to Ashkenazim, the pot must remain in one’s hand or in one’s hand while resting on a table or ground, however according to Sephardim, as long as the pot wasn’t placed on the ground, one may return it. <ref> Rama 253:2 writes that one of the conditions of [[Hachzara]] is that one keeps the pot in one’s hand. Mishna Brurah 253:55 writes that it’s forbidden to return the pot even if one put it down on a table or bench. The Shemirat [[Shabbat]] KeHilchata 1:18 writes that if one keeps one hand on the pot as one rests in on a table one may return the pot to the covered fire. Many achronim including Torat [[Shabbat]] 253:11, Demesk Eliezer 253:11, Sh”t Igrot Moshe 4:74:33, and the 39 Melachos (vol 2 pg 619, by Rabbi Ribiat) rule that as one as one keeps one’s hand on the pot even if the pot was rested on a table or bench one may return the pot. [However, from the Biur Halacha 253:2 D”H Velo it seems not like this.] On the other hand, S”A 253:2 writes that one of the conditions is to make sure not to place the pot on the ground. Magan Avraham 253:20 writes that the S”A argues on the Rama and permits leaving it on a table or bench if one intends to return it to the fire. Thus, Yalkut Yosef ([[Shabbat]] vol 1 pg 103) writes that there’s no requirement to have the food in one's hand. </ref>
## According to Ashkenazim, the pot must remain in one’s hand or in one’s hand while resting on a table or ground, however according to Sephardim, as long as the pot wasn’t placed on the ground, one may return it. <ref> Rama 253:2 writes that one of the conditions of [[Hachzara]] is that one keeps the pot in one’s hand. Mishna Brurah 253:55 writes that it’s forbidden to return the pot even if one put it down on a table or bench. The Shemirat [[Shabbat]] KeHilchata 1:18 writes that if one keeps one hand on the pot as one rests in on a table one may return the pot to the covered fire. Many achronim including Torat [[Shabbat]] 253:11, s.v. Velo it seems not like this.] On the other hand, S”A 253:2 writes that one of the conditions is to make sure not to place the pot on the ground. Magan Avraham 253:20 writes that the S”A argues on the Rama and permits leaving it on a table or bench if one intends to return it to the fire. Thus, Yalkut Yosef ([[Shabbat]] vol 1 pg 103) writes that there’s no requirement to have the food in one's hand. </ref>
## According to Ashkenazim, the food (liquid and solid) should be slightly warm in order to return it to the fire, however some argue that solids don’t need to be warm at all. On the other hand, according to Sephardim, the liquids must still be 113 degrees (and solids can be cold). <ref> S”A 253:2 writes that a condition of [[Hachzara]] is that the food is still boiling meaning that it’s 113 degrees. This condition is referring specifically to liquids as the Mishna Brurah 253:54 explains that this condition is dependant one of [[bishul]] and not [[Hachzara]]. Since S”A 318:4 rules that a liquid may not be heated up once it’s not 113 degrees, so too here a liquid may not be put back on the covered fire unless it’s 113 degrees. However, Rama 253:2 and 318:15 writes that Ashkenazim are lenient to allow returning a fully cooked liquid as long as it’s now slightly warm. So holds Mishna Brurah 253:54 and Shemirat [[Shabbat]] KeHilchata 1:18. Regarding solids, the Magan Avraham 253:36 writes that it also must be somewhat warm in order to return it to the fire. However, the Biur Halacha 253:5 D”H Ubilvad argues on the Magan Avraham based on the Buir HaGra. [It seems that Mishna Brurah 253:54, 91 rules like the Gra against the Magan Avraham even though he quotes the Magan Avraham (in 253:68).] The Shemirat [[Shabbat]] KeHilchata 1:18 seems to rule like the Magan Avraham, however, it’s unclear what he holds based on the footnote. Yalkut Yosef ([[Shabbat]] vol 1 pg 103) and Menuchat Ahava (3:2, vol 1 pg 50) agree with the Biur Halacha that one may be lenient like the Gra. </ref>
## According to Ashkenazim, the food (liquid and solid) should be slightly warm in order to return it to the fire, however some argue that solids don’t need to be warm at all. On the other hand, according to Sephardim, the liquids must still be 113 degrees (and solids can be cold). <ref> S”A 253:2 writes that a condition of [[Hachzara]] is that the food is still boiling meaning that it’s 113 degrees. This condition is referring specifically to liquids as the Mishna Brurah 253:54 explains that this condition is dependant one of [[bishul]] and not [[Hachzara]]. Since S”A 318:4 rules that a liquid may not be heated up once it’s not 113 degrees, so too here a liquid may not be put back on the covered fire unless it’s 113 degrees. However, Rama 253:2 and 318:15 writes that Ashkenazim are lenient to allow returning a fully cooked liquid as long as it’s now slightly warm. So holds Mishna Brurah 253:54 and Shemirat [[Shabbat]] KeHilchata 1:18. Regarding solids, the Magan Avraham 253:36 writes that it also must be somewhat warm in order to return it to the fire. However, the Biur Halacha 253:5 s.v. Ubilvad argues on the Magan Avraham based on the Buir HaGra. [It seems that Mishna Brurah 253:54, 91 rules like the Gra against the Magan Avraham even though he quotes the Magan Avraham (in 253:68).] The Shemirat [[Shabbat]] KeHilchata 1:18 seems to rule like the Magan Avraham, however, it’s unclear what he holds based on the footnote. Yalkut Yosef ([[Shabbat]] vol 1 pg 103) and Menuchat Ahava (3:2, vol 1 pg 50) agree with the Biur Halacha that one may be lenient like the Gra. </ref>
===Clarification of the first requirement===
===Clarification of the first requirement===
# One may not return the inset of a crockpot to the base unless it was covered with aluminum foil (or the like) and it's preferable to cover the knob as well. <ref> [[Shabbos]] Kitchen (Rabbi Simcha Bunim Cohen, p. 60)</ref>
# One may not return the inset of a crockpot to the base unless it was covered with aluminum foil (or the like) and it's preferable to cover the knob as well. <ref> [[Shabbos]] Kitchen (Rabbi Simcha Bunim Cohen, p. 60)</ref>
===Clarification of the forth requirement===
===Clarification of the forth requirement===
# According to Ashkenazim, in cases of need one may return food if it was placed on a table or bench as long as one had intent to return it a covered fire. <Ref> Buir Halacha 253:2 D”H VeDato writes in cases where one had intent to return the pot to the fire, and left it on the ground, in a case of need there’s room to be lenient. Shemirat [[Shabbat]] KeHilchata 1:19, Orchot [[Shabbat]] (vol 1 pg 85) agree. (It seems, however, that the Orchot [[Shabbat]] quotes Biur Halacha even in cases where there’s no need). </ref>
# According to Ashkenazim, in cases of need one may return food if it was placed on a table or bench as long as one had intent to return it a covered fire. <Ref> Buir Halacha 253:2 s.v. VeDato writes in cases where one had intent to return the pot to the fire, and left it on the ground, in a case of need there’s room to be lenient. Shemirat [[Shabbat]] KeHilchata 1:19, Orchot [[Shabbat]] (vol 1 pg 85) agree. (It seems, however, that the Orchot [[Shabbat]] quotes Biur Halacha even in cases where there’s no need). </ref>
# Some say that marble countertops are considered like a table or bench and if placed down there without intent, one may return it if there’s a need for the food. However, others say that marble countertops are considered like the ground and one shouldn’t return it to the fire unless there’s no other hot food. <Ref> Regarding placing a pot on a marble countertop there’s a dispute in the poskim. Petach Dvir 253:2, Sh”t Yitzchak Yiranen 2:42, and Menuchat Ahava 3:2, 3:8(3) write that anything attached to the ground is considered like the ground. Yalkut Yosef ([[Shabbat]] vol 1 pg 193 note 9) says that one has what to rely on if it was left on marble and not on the ground itself. Orchot [[Shabbat]] 2:46 brings a dispute between Rav Elyashiv, Rav Shlomo Zalman, and Rav Nassim Karlitz who are lenient regarding marble counters while, Rav Wosner is strict on this issue. </ref>
# Some say that marble countertops are considered like a table or bench and if placed down there without intent, one may return it if there’s a need for the food. However, others say that marble countertops are considered like the ground and one shouldn’t return it to the fire unless there’s no other hot food. <Ref> Regarding placing a pot on a marble countertop there’s a dispute in the poskim. Petach Dvir 253:2, Sh”t Yitzchak Yiranen 2:42, and Menuchat Ahava 3:2, 3:8(3) write that anything attached to the ground is considered like the ground. Yalkut Yosef ([[Shabbat]] vol 1 pg 193 note 9) says that one has what to rely on if it was left on marble and not on the ground itself. Orchot [[Shabbat]] 2:46 brings a dispute between Rav Elyashiv, Rav Shlomo Zalman, and Rav Nassim Karlitz who are lenient regarding marble counters while, Rav Wosner is strict on this issue. </ref>
===If some of the conditions are lacking===
===If some of the conditions are lacking===
# If the pot was placed on a table or chair (and let go) but one had intent to return it to the fire, or one still has it in one’s hand but didn’t have intent to return it to the fire, one may be lenient if the food is needed as long as the other requirements (covered fire, fully cooked, still warm) have not been breached. <Ref> Buir Halacha 253:2 D”H VeDato (and Mishna Brurah 253:56) writes that if necessary (Shat Tzorech) one can rely on the Rishonim who say one doesn’t need intent if it’s still in one’s hand or one doesn’t need it in one’s hands if one has intent. Shemirat [[Shabbat]] KeHilchata 1:19 agrees. </ref>
# If the pot was placed on a table or chair (and let go) but one had intent to return it to the fire, or one still has it in one’s hand but didn’t have intent to return it to the fire, one may be lenient if the food is needed as long as the other requirements (covered fire, fully cooked, still warm) have not been breached. <Ref> Buir Halacha 253:2 s.v. VeDato (and Mishna Brurah 253:56) writes that if necessary (Shat Tzorech) one can rely on the Rishonim who say one doesn’t need intent if it’s still in one’s hand or one doesn’t need it in one’s hands if one has intent. Shemirat [[Shabbat]] KeHilchata 1:19 agrees. </ref>
# If one didn’t have intent to return the pot to the fire and the pot was placed on a table or chair (and let go), one shouldn’t be lenient to eat the food unless there’s no other hot food. <Ref>Shemirat [[Shabbat]] KeHilchata 1:20 </ref>
# If one didn’t have intent to return the pot to the fire and the pot was placed on a table or chair (and let go), one shouldn’t be lenient to eat the food unless there’s no other hot food. <Ref>Shemirat [[Shabbat]] KeHilchata 1:20 </ref>
# If one didn't have intent to return the pot to the fire or that the pot was placed on a table or chair (and let go), one may return a pot of food to the fire as long as the food is needed and the other four requirements are satisfied. <ref> Shemirat [[Shabbat]] KeHilchata 1:19 </ref>
# If one didn't have intent to return the pot to the fire or that the pot was placed on a table or chair (and let go), one may return a pot of food to the fire as long as the food is needed and the other four requirements are satisfied. <ref> Shemirat [[Shabbat]] KeHilchata 1:19 </ref>
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* Additionally, Rabbenu Yerucham quotes a dispute whether this leniency applies even if the bottom pot is on the fire, or only if it isn’t on the fire. S”A 318:7 quotes these two opinions without ruling. Magen Avraham 318:24 and Mishna Brurah 318:55 rule like the first opinion. Thus, Shemirat [[Shabbat]] KeHilchata 1:42 rules that one may place cold fully cooked solid food on top of another pot of food that is on the fire, even if it will become Yad Soldet Bo. [[Shabbos]] Kitchen (p. 41-2) and Orchot [[Shabbat]] (p. 99) agree.</ref> According to Sephardim, a fully cooked liquid, which is also at least Yad Soledet Bo is the equivalent of a fully cooked solid food, according to Ashkenazim, a fully cooked liquid which is at least slightly warm, is the equivalent of fully cooked solid food. <ref>Even though S"A 318:7 writes that liquids must be as hot as Yad Soldet Bo, Rama 318:15 argues that even if it’s just slightly warm it’s permissible. Shemirat [[Shabbat]] KeHilchata 1:36 agrees. </ref>
* Additionally, Rabbenu Yerucham quotes a dispute whether this leniency applies even if the bottom pot is on the fire, or only if it isn’t on the fire. S”A 318:7 quotes these two opinions without ruling. Magen Avraham 318:24 and Mishna Brurah 318:55 rule like the first opinion. Thus, Shemirat [[Shabbat]] KeHilchata 1:42 rules that one may place cold fully cooked solid food on top of another pot of food that is on the fire, even if it will become Yad Soldet Bo. [[Shabbos]] Kitchen (p. 41-2) and Orchot [[Shabbat]] (p. 99) agree.</ref> According to Sephardim, a fully cooked liquid, which is also at least Yad Soledet Bo is the equivalent of a fully cooked solid food, according to Ashkenazim, a fully cooked liquid which is at least slightly warm, is the equivalent of fully cooked solid food. <ref>Even though S"A 318:7 writes that liquids must be as hot as Yad Soldet Bo, Rama 318:15 argues that even if it’s just slightly warm it’s permissible. Shemirat [[Shabbat]] KeHilchata 1:36 agrees. </ref>
# Note that this leniency only applies if the bottom pot is filled with food and not if it is empty. <ref>  
# Note that this leniency only applies if the bottom pot is filled with food and not if it is empty. <ref>  
* S"A 318:8 rules that one may place fully cooked cold food on top of another pot on the fire. On the other hand, the S”A 253:3 rules that one may return food on top of an old pot only if the food is still hot and wasn’t placed on the ground, implying that placing food on top of another pot isn’t permitted without the conditions of [[Hachzara]]. The Pri Megadim E”A 253:33 answers that the leniency spoken about in 318:8 only applies if the bottom pot is filled with food, and not if it is empty. Bei’ur Halacha 253:3 D”H Veyezaher, Chazon Ish 37, Sh”t Az Nidbaru 3:14, and [[Shabbos]] Kitchen (Rabbi Simcha Bunim Kohen; pg 42) agree that the bottom pot must be filled with food. See, however, Sh”t Shevet HaLevi 1:91.  
* S"A 318:8 rules that one may place fully cooked cold food on top of another pot on the fire. On the other hand, the S”A 253:3 rules that one may return food on top of an old pot only if the food is still hot and wasn’t placed on the ground, implying that placing food on top of another pot isn’t permitted without the conditions of [[Hachzara]]. The Pri Megadim E”A 253:33 answers that the leniency spoken about in 318:8 only applies if the bottom pot is filled with food, and not if it is empty. Bei’ur Halacha 253:3 s.v. Veyezaher, Chazon Ish 37, Sh”t Az Nidbaru 3:14, and [[Shabbos]] Kitchen (Rabbi Simcha Bunim Kohen; pg 42) agree that the bottom pot must be filled with food. See, however, Sh”t Shevet HaLevi 1:91.  
* See Shemirat [[Shabbat]] KeHilchata (chap 1, note 126) who writes that if the empty pot isn't on top of the fire directly but rather on top of a tray which covered the fire, then one may place fully cooked solid food on top of the empty pot because that's considered like a pot on top of a pot. Piskei Teshuvot 253:25 agrees. Also, Orchot [[Shabbat]] (p. 100) writes that some permit placing fully cooked cold food on top of an empty pot on top of an electric hot plate. However, Rav Mordechai Willig in Am Mordechai (p. 30) disagrees because there should be no difference between one blech and two or a flat blech and a crooked blech. </ref>
* See Shemirat [[Shabbat]] KeHilchata (chap 1, note 126) who writes that if the empty pot isn't on top of the fire directly but rather on top of a tray which covered the fire, then one may place fully cooked solid food on top of the empty pot because that's considered like a pot on top of a pot. Piskei Teshuvot 253:25 agrees. Also, Orchot [[Shabbat]] (p. 100) writes that some permit placing fully cooked cold food on top of an empty pot on top of an electric hot plate. However, Rav Mordechai Willig in Am Mordechai (p. 30) disagrees because there should be no difference between one blech and two or a flat blech and a crooked blech. </ref>
# If the food isn't fully cooked, one may not place the food on top of another pot which is on the fire <Ref> S”A 318:7-8 quotes a dispute whether one may place a pot with cold solids or hot liquids which are Yad Soldet Bo on top of a pot that’s on the fire and rules leniently. Even though the Taz 318:11 writes that it’s permissible even if it’s not fully cooked (but seems to require that the pot will not be able to cook), Mishna Brurah 318:55 rules that the food must be fully cooked based on many Achronim (Bach, Gra, Tosefet [[Shabbat]], Olat [[Shabbat]], Maamer Mordechai, Pri Megadim) who disagree with the Taz 318:9 on a similar issue. Shemirat [[Shabbat]] KeHilchata 1:36 rules like the Mishna Brurah. </ref> unless there's no chance that the pot will reach Yad Soldet Bo if it was left there. <Ref> Buir Halacha 318:6 D”H Ad SheTehe, Shemirat [[Shabbat]] KeHilchata 1:36 </ref>
# If the food isn't fully cooked, one may not place the food on top of another pot which is on the fire <Ref> S”A 318:7-8 quotes a dispute whether one may place a pot with cold solids or hot liquids which are Yad Soldet Bo on top of a pot that’s on the fire and rules leniently. Even though the Taz 318:11 writes that it’s permissible even if it’s not fully cooked (but seems to require that the pot will not be able to cook), Mishna Brurah 318:55 rules that the food must be fully cooked based on many Achronim (Bach, Gra, Tosefet [[Shabbat]], Olat [[Shabbat]], Maamer Mordechai, Pri Megadim) who disagree with the Taz 318:9 on a similar issue. Shemirat [[Shabbat]] KeHilchata 1:36 rules like the Mishna Brurah. </ref> unless there's no chance that the pot will reach Yad Soldet Bo if it was left there. <Ref> Buir Halacha 318:6 s.v. Ad SheTehe, Shemirat [[Shabbat]] KeHilchata 1:36 </ref>
# It’s forbidden to place a pot on top of another pot where the top pot contains food with containing large quantities of congealed fat. However, if there’s only a little congealed fat such that when melted it mixes with the rest of the food it’s permissible. If fat was dissolved it may be eaten. It’s also permitted to dissolve a sauce that is normally eaten in its congealed state such as fish sauce. <Ref> Shemirat [[Shabbat]] KeHilchata 1:37 </ref>
# It’s forbidden to place a pot on top of another pot where the top pot contains food with containing large quantities of congealed fat. However, if there’s only a little congealed fat such that when melted it mixes with the rest of the food it’s permissible. If fat was dissolved it may be eaten. It’s also permitted to dissolve a sauce that is normally eaten in its congealed state such as fish sauce. <Ref> Shemirat [[Shabbat]] KeHilchata 1:37 </ref>
===Kedeirah Blech===
===Kedeirah Blech===
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# Some say that if solid food was on the Blech during Bein HaShemashot and was removed on [[Shabbat]], it may be returned to a covered fire on [[Shabbat]] as long as it is fully cooked, while many others reject this leniency. <Ref>
# Some say that if solid food was on the Blech during Bein HaShemashot and was removed on [[Shabbat]], it may be returned to a covered fire on [[Shabbat]] as long as it is fully cooked, while many others reject this leniency. <Ref>
* The Ran ([[Shabbat]] 17b) infers from the Yerushalmi that if food was on the fire from before [[Shabbat]] and was removed only once [[Shabbat]] began, it may be returned without all of the conditions of [[Hachzara]]. Bet Yosef 253:2 writes that many Rrishonim, including Tosfot, Rosh, and Rambam, disagree with the Ran. Nonetheless, the Rama 253:2 records the minhag to rely on the Ran but advises one to be strict. Mishna Brurah 253:63 explains that this leniency only removes the conditions of intending to return the food and keeping it in one’s hand; the food would still have to be fully cooked and placed on a covered fire.
* The Ran ([[Shabbat]] 17b) infers from the Yerushalmi that if food was on the fire from before [[Shabbat]] and was removed only once [[Shabbat]] began, it may be returned without all of the conditions of [[Hachzara]]. Bet Yosef 253:2 writes that many Rrishonim, including Tosfot, Rosh, and Rambam, disagree with the Ran. Nonetheless, the Rama 253:2 records the minhag to rely on the Ran but advises one to be strict. Mishna Brurah 253:63 explains that this leniency only removes the conditions of intending to return the food and keeping it in one’s hand; the food would still have to be fully cooked and placed on a covered fire.
* Magen Avraham 253:36 writes that besides for the other conditions of [[Hachzara]] it is only permitted to return a solid food to a covered fire if it is not completely cold because otherwise it looks like one is [[cooking]] on [[Shabbat]]. Bei’ur Halacha 253:5 D”H UBilvad, however, explains that the Gra argues that only liquids need to be warm in order to be returned, but solids may be returned even if they are cold. Shemirat [[Shabbat]] KeHilchata 1:20 and Sh”t Igrot Moshe 4:74:31 rule like the Magen Avraham, while Chazon Ovadyah (p. 80) agrees with the Gra. Mishna Brurah 253:67 defends the minhag to some degree. Chazon Ish dissapproves of relying on this leneincy. Rabbi Shimon Eider (Halachos of [[Shabbos]], chap 14, sec F, pg 355) rules that one should not rely on this lenient ruling and writes that the Mishna Brurah's defense wouldn't apply nowadays.
* Magen Avraham 253:36 writes that besides for the other conditions of [[Hachzara]] it is only permitted to return a solid food to a covered fire if it is not completely cold because otherwise it looks like one is [[cooking]] on [[Shabbat]]. Bei’ur Halacha 253:5 s.v. UBilvad, however, explains that the Gra argues that only liquids need to be warm in order to be returned, but solids may be returned even if they are cold. Shemirat [[Shabbat]] KeHilchata 1:20 and Sh”t Igrot Moshe 4:74:31 rule like the Magen Avraham, while Chazon Ovadyah (p. 80) agrees with the Gra. Mishna Brurah 253:67 defends the minhag to some degree. Chazon Ish dissapproves of relying on this leneincy. Rabbi Shimon Eider (Halachos of [[Shabbos]], chap 14, sec F, pg 355) rules that one should not rely on this lenient ruling and writes that the Mishna Brurah's defense wouldn't apply nowadays.
* Rav Soloveitchik (cited by Rabbi Jachter in “[[Hachzara]] and [[Hatmana]]”, koltorah.org) ruled that one may rely on the Ran. (This ruling of Rav Soloveitchik is also recorded in [http://books.google.com/books?id=XDzlvJ5zsfsC&pg=PA91&lpg=PA91&dq=rewarming+food+on+shabbos+the+rav+soloveitchik&source=bl&ots=zGIQw2Rkng&sig=3aiB2mMukVfevkvDRG94ziTvueY&hl=en&ei=TOuqToa3C6PW0QGO4uyEDw&sa=X&oi=book_result&ct=result&resnum=4&sqi=2&ved=0CDQQ6AEwAw#v=onepage&q&f=false Halakhic positions of Rabbi Joseph B. Soloveitchik], (Rabbi Zeigler, vol 4, pg 90-1) and by [http://www.tzemachdovid.org/thepracticaltorah/vayakhel.shtml Rabbi Michael Taubes].) This is also relying on the Gra’s opinion that only liquids need to be warm. Rav Mordechai Willig (Am Mordechai p. 47), however, rules that initially one should not rely on this lenient ruling. Rav Hershel Schachter (“Hilchos [[Bishul]] B’[[Shabbos]]”, min 52-5), Shemirat [[Shabbat]] KeHilchata 1:23, 39 Melachos ([[Bishul]] #203), and Halachos of [[Shabbos]] (p. 355) agree.  
* Rav Soloveitchik (cited by Rabbi Jachter in “[[Hachzara]] and [[Hatmana]]”, koltorah.org) ruled that one may rely on the Ran. (This ruling of Rav Soloveitchik is also recorded in [http://books.google.com/books?id=XDzlvJ5zsfsC&pg=PA91&lpg=PA91&dq=rewarming+food+on+shabbos+the+rav+soloveitchik&source=bl&ots=zGIQw2Rkng&sig=3aiB2mMukVfevkvDRG94ziTvueY&hl=en&ei=TOuqToa3C6PW0QGO4uyEDw&sa=X&oi=book_result&ct=result&resnum=4&sqi=2&ved=0CDQQ6AEwAw#v=onepage&q&f=false Halakhic positions of Rabbi Joseph B. Soloveitchik], (Rabbi Zeigler, vol 4, pg 90-1) and by [http://www.tzemachdovid.org/thepracticaltorah/vayakhel.shtml Rabbi Michael Taubes].) This is also relying on the Gra’s opinion that only liquids need to be warm. Rav Mordechai Willig (Am Mordechai p. 47), however, rules that initially one should not rely on this lenient ruling. Rav Hershel Schachter (“Hilchos [[Bishul]] B’[[Shabbos]]”, min 52-5), Shemirat [[Shabbat]] KeHilchata 1:23, 39 Melachos ([[Bishul]] #203), and Halachos of [[Shabbos]] (p. 355) agree.  
* [http://www.yutorah.org/lectures/lecture.cfm/761944/Rabbi_Dovid_Miller/Shabbat_42_-_Bishul_11_-_hachzara_on_blechs_and_plattas Rabbi Dovid Miller] in explaining the topic emphasizes that Rav Soloveitchik only permitted reheating fully cooked solid food but not liquids or soup. </ref>
* [http://www.yutorah.org/lectures/lecture.cfm/761944/Rabbi_Dovid_Miller/Shabbat_42_-_Bishul_11_-_hachzara_on_blechs_and_plattas Rabbi Dovid Miller] in explaining the topic emphasizes that Rav Soloveitchik only permitted reheating fully cooked solid food but not liquids or soup. </ref>