Kashrut
Among the numerous laws that form "kashrut" are prohibitions on the consumption of certain animals (such as pork and shellfish), mixtures of meat and milk, and the commandment to slaughter mammals and birds according to a process known as "shechita". There are also laws regarding agricultural produce that might impact the suitability of food for consumption.
Israeli cuisine
Fish, traditionally carp, but now other firm white fish too, are minced and shaped into loaves or balls and cooked in fish broth, such as the gefilte fish of the Ashkenazi Jews, who also brought pickled herring from Eastern Europe. Herring is often served at the kiddush that follows synagogue services on Shabbat, especially in Ashkenazi communities. In the Russian immigrant community it may be served as a light meal with boiled potatoes, sour cream, dark breads and schnapps or vodka.