Mexican Casserole with hamburger

1 lb extra lean ground beef 1 cup onion , chopped 1 (14 ounce) can diced tomatoes , drained 1 1/2 cups frozen corn 1 (540 ml) can black beans , drained and[...]

2 lbs hamburger 1 (12 ounce) can red enchilada sauce (mild or hot) 1 (10 1/2 ounce) can cream of mushroom soup (undiluted) 1 (10 1/2 ounce) can cream of[...]

1 lb extra lean ground beef 1 cup onion , chopped 1 (14 ounce) can diced tomatoes , drained 1 1/2 cups frozen corn 1 (540 ml) can black beans , drained and[...]