2 boxes frozen French style green beans (thawed)
1 medium onion, chopped
1 cup sliced water chestnuts
1 cup shredded cheese
1 can cream of mushroom soup
1 can French fried onion rings
Sauté onions in butter.
Layer in a greased casserole: Beans , onions, water chestnuts, cheese, mushroom soup. Repeat layers
Bake 25 minutes at 350 or until heated through. Add onion rings the last 5 minutes.