Mexican Casserole with soup

1 lb lean ground beef 1 medium onion , finely chopped 1 (10 1/2 ounce) can cream of mushroom soup 1 (15 ounce) can ranch style beans 1 (10 1/2 ounce) can[...]

12 ounces vegetarian ground beef (I use Morning Star Farms "Meal Starters") 2 cups cooked brown rice 2 cups mixed vegetables (defrosted) 1 (1 1/2 ounce)[...]

12 ounces Doritos, crumbled up 2 lbs ground beef 1 onion , chopped 1 bell pepper , chopped 10 1/2 ounces cream of mushroom soup 10 1/2 ounces cream of chicken[...]