By tradition ricotta was made on Thursday so that the cheese would be ready for Sunday’s traditional tortelli d’erbette. Erbette literally means “grass,” but in Parma it is also the name of a local green similar to Swiss chard. Tortelli d’erbette is a ravioli-like pasta stuffed with ricotta, Parmigiano cheese, erbette, salt, and two spices that were a passion in the thirteenth century and highly profitable cargo for the ships of both Venice and Genoa: black pepper and nutmeg. Tortelli d’erbette was and still is served with nothing but butter and grated Parmigiano cheese.