String Bean Casserole

2 Pkgs Frozen string beans
1 can cream of mushroom soup
3/4 cup milk
Durkee onion rings

1.  Preheat oven to 350
2.  Cook string beans 
3.  Mix soup and milk and pour over string beans.  Mix well
4.  Stir in 1/2 cup of onion rings
5.  Bake for 20 - 25 minutes
6.  Sprinkle with 1/2 cup of onion rings on top
7.  Bake an additional 5 minutes until onion rings are crisp and browned