Wikipedia
Magiritsa
Magiritsa is a Greek soup made from lamb offal, associated with the Easter (Pascha) tradition of the Greek Orthodox Church. Accordingly, Greek-Americans and Greek-Canadians sometimes call it "Easter soup", "Easter Sunday soup", or "Easter lamb soup". In some parts of Greece, most notably Thessaly, it is not served as soup but rather as a fricassee, where it contains only offal and large variety of vegetables, but no onions or rice, as in the soup.