Dad'S Mexican Casserole
["1 1/2 lb. ground beef", "1 small onion, chopped", "1 can Ro-Tel tomatoes", "1 can cream of mushroom soup", "1 (10 oz.) can enchilada sauce", "1 large pkg. plain or taco flavor Doritos", "1 lb. grated Cheddar cheese"]
["In a large skillet, brown meat and onion.", "Add all other ingredients, except cheese and chips, in 2 1/2-quart casserole dish.", "Layer meat mixture and Doritos, repeating until meat is all gone.", "Top with Cheddar cheese.", "Bake at 350\u00b0 until cheese is all melted."]
["ground beef", "onion", "Ro-Tel tomatoes", "cream of mushroom soup", "enchilada sauce", "Doritos", "Cheddar cheese"]