Speck is similar to prosciutto, as it is an Italian ham, but it is smoked. Prosciutto that we buy here is usually raw and salted, while in Italy there is a distinction between prosciutto crudo, raw, and prosciutto cotto, cooked. If you find it whole, have it cut into ½-cm (¼-inch) thick slices, then cut it into small pieces. Otherwise, look for a good Italian prosciutto. Guanciale is made from pork cheek, salted and dried. You can find it in Italian grocery stores.