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".
Portuguese cuisine
Alentejo is a vast agricultural province with only one sizeable fishing port, Sines; and in the past, shellfish would not have been available in the inland areas. On the other hand, all points in the Algarve are relatively close to the coast and pigs used to be fed with fish, so clams were added to the fried pork to disguise the fishy taste of the meat. Nowadays, however, nobody would dream of calling it "carne de porco à Algarvia". Legend also says that the dish was developed to test Jewish converts' new Christian faith; consisting of pork and shellfish (two non-kosher items), "Marranos" were expected to eat the dish in public in order to prove their complete detachment from the Jewish faith.