CampbellsKitchen.com and BettyCrocker.com both offer easy chicken tetrazzini recipes. Both recipes use some prepared ingredients to reduce the preparation time for the dish. The Campbell's version can be made in only 25 minutes.
To make Campbell's Kitchen's chicken tetrazzini, combine 10 1/2 ounces condensed cream of mushroom soup, 3/4 cup water, 1/2 cup Parmesan cheese, 2 tablespoons chopped parsley and 1/4 cup chopped red bell pepper. Add 8 ounces cooked spaghetti and 12.5 ounces canned chicken. Heat the mixture in a saucepan until it begins to bubble, and then serve it. Some users on the site recommend adding extra vegetables such as mushrooms or celery.