Chicken Spagetti ... The BEST chicken casserole ever. Besides being delicious, it's quick and easy to make. This is my FAVORITE recipe ever & everyone always loves it- it also lasts for a couple days * tastes even better day two! Chicken Spaghetti You need only seven ingredients: angel hair pasta, chicken (grilled or canned), cream of chicken and cream of mushroom soup, Rotel, sour cream and cheese.