Pesto with roasted potatoes and sirloin steak. Vegan variations of pesto can include mixes of fresh basil, nuts such as walnut or pine nut, olive oil, and the addition of miso paste and nutritional yeast to provide additional flavor enhancement to the dish. For reasons of expense or availability, walnuts, pecans, cashews or even peanuts are sometimes substituted for the traditional pine nuts. Also, while the nuts are traditionally used as is, some recipes call for prior toasting. While not preferable, other culinary nuts may be used due to the taste disturbances that some people may experience after consuming pine nuts
Italian cuisine with use of tomato are spread in all Italy. Italians like their ingredients fresh and subtly seasoned and spiced. In Northern Italy though there are many kinds of stuffed pasta, polenta and risotto are equally popular if not more so. Ligurian ingredients include several types of fish and seafood dishes. Basil (found in pesto), nuts, and olive oil are very common. In Emilia-Romagna, common ingredients include ham (prosciutto), sausage (cotechino), different sorts of salami, truffles, grana, Parmigiano-Reggiano, and tomatoes (Bolognese sauce or ragù). Traditional Central Italian cuisine uses ingredients such as tomatoes, all kinds of meat, fish, and pecorino cheese.