Gefilte Fish for Passover Seder
Baked Gefilte Fish Loaf (Pareve, Passover)
Gefilte fish is a loaf of chopped up fish, usually white-fleshed freshwater fish such as carp or pike.
Classic Gefilte Fish (Parve)
At the time of the Mishna (200 CE), rabbis deemed it meritorious to eat fish on the Sabbath. Due to the plethora of rivers in Europe, Ashkenazi Jews tended to cook with freshwater fish. Eastern European Jews would make a mixture of chopped fish, stuff it back into the skin of the fish, and boil it. The word gefilte means stuffed in Yiddish.
MarthaStewart.com: Gefilte Fish with Fresh Beet Horseradish
Homemade Gefilte Fish does take some effort and time, but it is so much better than jarred Gefilte Fish.