1. Last week, we learned some of the basic principles regarding the prohibition of bishul on Shabbat. This week, we will begin by discussing the case of bishul achar bishul reheating already cooked foods on Shabbat. Rishonim disagree whether the prohibition of bishul applies to heating previously cooked foods that have cooled below the temperature of yad soledet bo (approximately 40-45 degrees Celsius or 104-113 degrees Fahrenheit, as discussed last week).

2. The Shulchan Aruch (O.C. 318:4,15) rules that such foods are subject to the prohibition of bishul if they are liquid, but not if they are solid. This is the Sephardic position. The Rema holds that since there are more lenient opinions, one may be lenient even for liquids as long as the food has not cooled down completely. This is the Ashkenazic position.

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Dedicated by Fran Broder as a zechus for everlasting peace in Eretz Yisrael in the merit of learning Hilchos Shabbos.