Though the dish sounds very italian, tetrazzini is actually an american dish that was purportedly named after american opera singer luisa tetrazzini. It is commonly made with turkey or chicken, spaghetti, and a creamy parmesan cheese sauce which is made with the addition of sherry. Mushrooms are usually included in the dish as well. Turkey, chicken, tuna, salmon, and ham are some of the many possible variations on the dish, and different cheeses may be used in the sauce. Turkey tetrazzini has long been a favorite way to use leftover turkey. But you don't have to wait for a major holiday dinner to make this tasty dish. Make it with diced cooked chicken or cook a simple turkey breast or turkey tenderloins to use in the dish. The combination of pasta, cheeses, turkey, and parmesan is delicious. This version is a shortcut version made with condensed cream of mushroom soup instead of the more traditional white sauce.