Gefilte fish

Gefilte fish is an Ashkenazi Jewish dish made from a poached mixture of ground deboned fish, such as carp, whitefish, or pike, which is typically eaten as an appetizer

Although the dish historically consisted of a minced-fish forcemeat stuffed inside the fish skin, as its name implies, since the 19th century the skin has commonly been omitted and the seasoned fish is formed into patties similar to quenelles or fish balls. They are popular on Shabbat and Holidays such as Passover, although they may be consumed throughout the year.

Originally a stuffed fish, filled with a mixture of chopped fish, eggs, onions, matzo meal or crumbs, and spices. Nowadays, it usually refers to poached fish cakes or a fish loaf, sometimes made with matzo meal.