Clean Monday
Clean Monday is a public holiday in Greece and Cyprus, where it is celebrated with outdoor excursions, the consumption of shellfish and other fasting food, a special kind of azyme bread, baked only on that day, named "lagana" () and the widespread custom of flying kites. Eating meat, eggs and dairy products is traditionally forbidden to Orthodox Christians throughout Lent, with fish being eaten only on major feast days, but shellfish is permitted in European denominations. This has created the tradition of eating elaborate dishes based on seafood (shellfish, molluscs, fish roe etc.). Traditionally, it is considered to mark the beginning of the spring season, a notion which was used symbolically in Ivan Bunin's critically acclaimed story, "Pure Monday".
Jewish cuisine
Gefilte fish (from German "gefüllte" "stuffed" fish) was traditionally made by skinning the fish steaks, usually German carp, de-boning the flesh, mincing it and mixing with finely chopped browned onions (3:1), eggs, salt, pepper, and vegetable oil. The fish skin and head were then stuffed with the mixture and poached. The religious reason for a boneless fish dish for the Sabbath is the prohibition of separating bones from food while eating [the prohibition of 'borer', separating]
A more common commercially packaged product found today is the "Polish" gefilte fish patties or balls, similar to quenelles, where sugar is added to the broth, resulting in a slightly sweet taste. Strictly speaking they are the fish filling, rather than the complete filled fish. This method of serving evolved from the tradition of removing the stuffing from the skin, rather than portioning the entire fish into slices before serving.