Tonnarelli cacio e pepe by Frank Fariello

Cacio e pepe, literally 'cheese and pepper', is a very typical Roman dish, usually made with spaghetti, bucatini or—for the ne plus ultra version of this dish—tonnarelli, a kind of square spaghetti made with egg pasta popular in Lazio and Abruzzo, as well parts of Molise, Puglia and Le Marche.