This Easy Chicken Spaghetti Casserole is a comforting and hearty dish perfect for weeknight dinners or family gatherings. Made with tender diced chicken, tender spaghetti noodles, creamy fat-free cream of chicken soup, diced tomatoes, and a blend of cheeses, it combines simple ingredients into a flavorful baked casserole. Seasoned with onions, green peppers, seasoned salt, and a dash of cayenne pepper for a subtle kick, this casserole is baked until bubbly and golden on top, delivering a satisfying and crowd-pleasing meal.