Preparing Egg and Liver on Shabbos
Question: I’ve always prepared my egg and liver before Shabbos lunch. Is that a problem? Answer: The Shulchan Aruch (OC 321:9) writes that the melacha of tochen, grinding, doesn’t apply to food that doesn’t grow from the ground such as meat and eggs. Thus, while one needs to be careful not to chop the onion too fine, one is allowed to cut liver and eggs into very small pieces or mash it with a fork (Shemiras Shabbos Kehilchasa 8:23). The Mishna Berura (321:36) writes, however, that one mustn’t use a specialized utensil such as a grater to cut such foods, as it is uvda dechol , weekday activity. R’ Yehoshua Neuwirth (Shemiras Shabbos Kehilchasa 6:3) writes that one may use an egg slicer even for vegetables, as it is simply a few ’knives’ placed closely together. As shelling the eggs is considered borer, separating, one must only prepare them right before the meal. Another potential issue with mixing the ingredients together is losh , kneading. R’ Yehoshua Neuwirth (Shemiras ...