Refrigerated Mashed Potatoes

INGREDIENTS

5 lbs. potatoes, peeled, quartered, cooked in salted water, drained
6 oz. cream cheese
1 cup sour cream
2 tsp. onion salt
1 tsp. salt
1/4 tsp. pepper
2 Tbs. margarine

DIRECTIONS
Add all ingredients to mashed potatoes until fluffy. Bake at 350 degrees for 30 minutes in a greased 2-quart casserole, uncovered. After it is baked, you can place in refrigerator for as long as 2 weeks and use what you need. Need to bake for 45 minutes then or microwave until heated through.