1 pkg. squash, frozen, cooked until tender
1 sm. onion
1 (8 oz.) sour cream
1 1/2 c. grated cheddar cheese
1 can chicken soup
3 slices bread, broken up

Mix all ingredients together. Crush Ritz crackers on top. Melt 2 or 3 tablespoons butter on top. Bake at 350 degrees for 30 minutes.