Paglia e fieno is a traditional dish originating from Siena. The name of the dish means straw and hay, referring to the green (spinach) pasta noodles as hay and the yellow (egg) pasta noodles as straw. It's best if the spinach and egg pasta is of the tagliatelle or taglierini (tajarin) varieties, combined with onions, prosciutto, peas, olive oil, and heavy cream.

The pasta is tossed with the other ingredients, and the dish is usually finished with grated Parmigiano-Reggiano, ground pepper, and chopped parsley.