1 (2 lb) package frozen hash brown potatoes, thawed
1 (8 ounce) package sliced ham, chopped
2 (10 3/4 ounce) cans cream of potato soup
1 (16 ounce) container sour cream
2 cups shredded sharp cheddar cheese
1 1/2 cups grated parmesan cheese
Preheat oven to 375 degrees. Lightly grease a 9 x 13 inch baking pan. In a large mixing bowl, combine potatoes, ham, potato soup, sour cream and cheddar cheese. Sprinkle with Parmesan cheese. Bake in preheated oven until sauce is browned and top is browned, about 60 minutes.