Pesach Halachot #7 - Shulchan Aruch Siman 476, Siman 477 | Rashba's Opinion of How Many Kezayit's in a Kabetza (Taut Sofer) - Mar 24, 2021 - Hilchot Pesach, Halachot of Pesach, Shulchan Aruch Orach Chayim, Eating Roasted food on pesach. Yechave Daat (Chelek 3:27),

Rashba's opinion on 4 kezetot in a kabetza. Rav Ben Haim's chidush on the Rashba in Mishmeret Habayit Bayit 4 Shaar 1 Page 96 Amud 1 (in old printing or in Rav Kook Printing: Chelek 2, Bayit 4 Shaar 1 Page 51 in the new printing). There is a Taut Sofer, which is why Rabbi Ovadia Yosef z"l couldn't understand this Rashba. Rabbi Ben Haim found the taut sofer