Mishna:

Shabbat 

Collections: R' Moshe Willig Tzurba Hilchos Shabbos

Description

What constitutes bishul? Unnecessary or damaging bishul. Microwave bishul - R Moshe Feinstein, R Shlomo Zalman Auerbach, Am Mordechai. We pointed out the qualitative difference between microwave cooking, where there is no outside heat source but rather the heat originates within the food itself, and all other types of cooking. We suggested that cooking in the sun, which is specifically permitted by the Gemara, might actually heat in a similar way. Beef jerky on Shabbos - depending on how it is made, either completely asur, or completely mutar.