2 (24 oz.) pkgs. frozen hash browns
1 (16 oz.) pkg. sharp cheddar cheese
2 cans cream of potato soup
1 1/2 c. sour cream
3/4 c. Parmesan cheese

Combine the first 4 ingredients. Place in a 9x13 glass baking dish. Top with Parmesan cheese. Bake 1 hour at 350 degrees. (Be sure to preheat.) Serves 8.