Green Bean Casserole 1 Ingredients 1 can cream of mushroom soup 1 can onion rings "Dried Crunchy Onion Rings" 2 cans green beans (drained) dash of black pepper Pour soup into a quart casserole. Add 1/2 can onion rings, both cans green beans, & pepper. Mix well. Bake at 350° F for 20 minutes. Put the other 1/2 can onion rings on top & bake 5 minutes longer.