Spinach Souffle
["1 lb. creamed cottage cheese", "3 (12 oz.) pkg. spinach, cooked", "1/3 lb. sharp Cheddar cheese", "4 Tbsp. flour", "1 medium onion, chopped", "6 Tbsp. melted butter", "4 eggs, separated"]
["Beat egg whites stiff.", "Mix all ingredients, except egg whites, then fold them in carefully.", "Bake in greased 9 x 13-inch casserole pan for 1 hour at 350\u00b0.", "Can be made the day before and refrigerated.", "If you do this, take it out an hour before you want to bake it."]
["cottage cheese", "spinach", "Cheddar cheese", "flour", "onion", "butter", "eggs"]