2 (12 oz.) pkgs. frozen hash browns (thawed)
10 oz. can cream of potato soup
1 c. sour cream
1/2 c. grated Cheddar cheese
1/4 c. Parmesan cheese

Mix first 4 ingredients. Place in greased 1 1/2-quart baking dish. Sprinkle with Parmesan cheese. Bake at 350 degrees for 35 minutes.