Thus, while some recipes are accepted by certain ethnic groups, others will not be. It's important to define and to establish your own ethnic traditions as your family begins Passover observances. Generally, packaged Passover foods are marked with a rabbinic seal of supervision and date for use during the current Passover holiday. Some normally kosher packaged foods do not need special labels if purchased before the holiday and kept unopened until Passover preparations begin. If purchased during Passover, the same items need a label.
Some ethnic groups prohibit certain herbs in pods and mustard seeds.
Obviously, various levels of observance exist. Consult your rabbi, Jewish Community Center or a list of published Passover products from a known kosher source. The Passover Ingredients Most American Jewish cooks use matzo, the humble bread of affliction, in various forms. Some Jews do not allow any matzo product to contact a liquid as it always swells. Generally, recipes requiring matzo products, including matzo farfel, matzo meal, matzo cake meal and potato starch, are basic to Passover cuisine.