Cowboy Casserole

This has kidney beans and green chilies and doesn't show the potatoes.

1 onion, chopped
1.5 lbs. cooked ground beef, drained
6 med potatoes, sliced 1/4 " thick
1 clove garlic, minced
16 oz can ranch beans, including liquid

15 oz can diced tomatoes, mixed with 2 T flour, with liquid.
1 t salt
1/4 c pepper

1. Layer onion, beef, potatoes, garlic and beans in crockpot.
2. Spread tomatoes on top. Sprinkle with salt and pepper.
3. Cover. Cook Low 5-6 hours or until potatoes are tender.