Green Bean Casserole
["1 small onion, chopped", "1 can mushrooms (optional)", "1/2 c. butter", "1/4 c. flour", "1 c. milk", "1 jar Cheez Whiz", "1 tsp. salt and pepper", "3 to 5 pkg. French-style frozen string beans, drained", "water chestnuts, sliced", "slivered almonds"]
["Cook green beans and drain.", "In casserole, layer beans, sauce and water chestnuts.", "Repeat layers.", "Top with slivered almonds. Bake in moderate oven for 1/2 hour."]
["onion", "mushrooms", "butter", "flour", "milk", "salt", "string beans", "water chestnuts", "almonds"]