Tortellini or Tagliatelle with Walnut Sauce

Traditional with tortellini, ravioli, or tagliatelle, walnut sauce is delicious on any flat strand, preferably fresh, pasta. The consistency of the chopped walnuts is largely a matter of taste; some Italian recipes recommend puréeing them to a paste, whereas some chefs leave them in lentil- to pea-size crunchy pieces.