2 cans cut green beans, drained
1 can cream of mushroom soup (condensed)
1 can French fried onion rings

Mix drained green beans with the condensed cream of mushroom soup. Add 1/2 can of the French fried onion rings. Place mixture in a casserole dish.

Cook for 20-30 minutes at 350 degrees. Add the remaining onion rings to top of casserole and brown.

OR: Place remaining onion rings on top of the casserole and microwave for 5 minutes. (Be sure to use a microwave safe casserole dish.)