Squash Casserole

Ingredients:
2 cups yellow squash
1 small onion chopped
1 cup sour cream
1 can cream of chicken soup
1 stick margarine
1 package pepperidge farm dressing mix

Directions:
Preheat oven to 350 degrees.
Mix cooked squash, onion, sour cream and soup.
Melt margarine and mix with dressing mix
Line bottom of casserole dish with dressing mix
Pour squash mixture on top of dressing mix
Cover the top with the remainder of the dressing mix
Bake at 350 degrees for 30 minutes.