Sugo or salsa all'amatriciana (Italian pronunciation: [ˈsuːɡo allamatriˈtʃaːna]) is a traditional Italian pasta sauce based on guanciale (cured pork cheek), pecorino cheese, tomato, and in most variations, onion. Originating from the town of Amatrice (in the mountainous Province of Rieti of Lazio region), the Amatriciana is one of the best known pasta sauces in Roman and Italian cuisine. The Italian government has named it a traditional agro-alimentary product of Lazio.