Squash Casserole - cooking recipe

Ingredients

2 c. cooked squash
1 medium onion, chopped fine
1 can cream of mushroom soup
1 large c. sour cream
1 stick margarine
1 pkg. Pepperidge Farm dressing

Preparation

Mix 3 tablespoons margarine with onion in a large pan.
Cook on medium heat; add squash and cook for 3 minutes.
Add soup and sour cream.
Stir until blended.
Pour in casserole dish.