Tator Tot Casserole

1 lb. hamburger
Diced onion
1 can tomato sauce
Tator tots
1 can green beans
Cheese

Place hamburger in 8x8 pan. Layer onions then green beans then tomato sauce then tator tots then cheese. Cover and cook at 375 for 45 minutes or until the meat is done. Double for a 9x13 pan. Enjoy!