32 oz. frozen hash browns, thawed
2 cans potato soup
2 c. sharp grated Cheddar cheese
1 c. Parmesan cheese, grated
16 oz. sour cream
Chopped onion, optional, to taste

Mix ingredients together. Place into 13 x 9 inch pan. Bake at 350 degrees for 40 minutes. Can be prepared the night before for baking next morning. Freezes well. Serves 12.