1 (32 oz.) pkg. frozen shredded hash browns, thawed
2 (10 3/4 oz.) cans potato soup, undiluted
2 (8 oz.) cartons sour cream
2 c. shredded sharp cheddar cheese
1 c. Parmesan cheese

Combine all ingredients. Stir well. Spoon into a greased 13x9x2 inch baking pan. Bake at 350 degrees for 40 minutes. Yield: 12-15 servings.