Dinner included truffle and ricotta ravioli and filet mignon and scallops. In Sardinia, ravioli are filled with ricotta and grated lemon rind. Popular stuffings include spinach and ricotta or minced beef. Maltese ravioli ("ravjul") are pockets of pasta filled with ricotta cheese. Fillings include orange-flavored ricotta, almond paste, and candied peel of citron. Some of the most popular sheep cheeses include feta (Greece), ricotta (Italy), and Roquefort (France). However, the dough is prepared differently&colon; it is made of flour and ricotta cheese instead. Typical of the winter season are the Pecorino, ricotta and strong ricotta (or cottage cheese). Gozitan cheeselets, for example, are used as filling for ravioli instead of the usual ricotta. It is lower in moisture than typical fresh cheeses such as ricotta. This version is made using Kahlua and espresso, with sweet ricotta and bittersweet chocolate shavings. Fresh soft ricotta is used as well. Accordingly, ricotta production requires large volumes of input milk. The product is rather like the Italian ricotta, which also is made from whey. The production of ricotta in the Italian peninsula dates back to the Bronze Age.