1 1/2-2 lb. yellow squash
1 sm. onion
1 sm. pkg. Stove Top stuffing
1 can cream of mushroom soup
1 c. sour cream
1 stick butter

Cook squash and onion together. Drain and mash together. Mix with remaining ingredients. Salt and pepper to taste. Grease baking dish. Bake at 350 degrees for 1 hour.