Mashed Potato Casserole - cooking recipe

Ingredients

9 large potatoes
6 oz. cream cheese
1 c. sour cream
2 tsp. onion salt
salt
pepper
margarine
milk

Preparation

Cook and mash potatoes as usual with small amount of milk. Add all rest of ingredients; blend into potatoes.
May be made day before using.
Store in refrigerator overnight.
Bake at 450\u00b0 for 45 minutes to an hour.