Question
Isn’t it true for Sefardim (like myself) that the manner of kashering follows the main use of the kli (according to Maran Shulchan Arukh)? Meaning that if a pot is used mainly for cooking with water, one would kasher it with hagalah even if you happen to cook directly over the fire? (like in my case). Countrary to the Rama who follows the manner of cooking with the highest heat, if I’m not mistaken.
Answer
Returning to your question, you are quite correct that according to the Shulchan Aruch (Siman 451 Se’if 6) we follow the majority use of the utensil in order to determine the method of kashering (or even sometimes to avoid kashering).
However, it is very clear from various Acharonim that this only pertains to the majority use of issur used in conjunction with the kli . In other words, when calculating majority use, the permissible usages of the utensil are of no consequence; it is only the issur uses which dictate how the utensil should be kashered (and in a case where one is kasheing from heter – e.g. chometz according to some or from meat to parev, the heter that one wishes to kasher).
As some references for this principle may I refer you to the Pri Megodim (Yoreh De’ah Siman 92 SD s.k. 38), the Chochmas Shlomo (Yoreh De’ah Siman 91), Shevet Halevi (Chelek 6 Siman 116), and the Mishna Berura (Siman 451 s.k. 155). (The Chazon Ish also follows this principle, but I don’t have the reference to hand.)
Therefore, even according to the Shulchan Aruch in this situation you are required to perform libbun.
As a final practical point, if you have a pyrolytic oven it is possible to achieve libbun in this (obviously plastic handles should be removed first).
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