Spaghettini verdi is a traditional pasta dish originating from Tuscany. It's made with a combination of extra-thin spaghettini pasta, butter, garlic, parsley, salt, pepper, and grated Parmigiano-Reggiano cheese. The spaghettini are cooked in salted water, drained, then returned to the pot with the butter, garlic, grated cheese, and parsley.