granite kashering

Answer

Answered by Aaron Abadi

We never Kasher a "Keli Sheni." A Keli Sheni means the second pot or utensil. The Gemara calls the pot on the fire a Keli Rishon (the first Pot), and once the food is transfered to another pot, dish, or whatever, it is now in a Keli Sheni. The Keli Sheni does not cook and does not require Kashering. Unless you put coals on your Granite and bake Challah right on your granite, it is not a Keli Rishon. Therefore, it does not need anything other than a good cleaning. If your countertop has holes and/or cracks where food can get stuck, then you must cover them for Pesach, as it says in Shulchan Aruch. The reason is that while preparing cold food on the counter on Pesach, a little crumb from the Chametz caught in the cracks might end up in your food. On Pesach Chametz is not Batel, even a minute amount. AA