Salsa di noci is a flavorful Ligurian sauce made with walnuts, garlic, butter, cream, olive oil, and cheeses such as Parmigiano-Reggiano or Grana Padano. The creamy, nutty sauce is often made in a mortar, just like the popular basil pesto. Traditionally, the sauce is served with pansotti, which are filled with ricotta and spinach, but it can also be paired with other pasta varieties such as fettuccine.