1 (32 ounce) package frozen hash brown potatoes 8 ounces cooked, diced ham 2 (10.75 ounce) cans condensed 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 F (190 degrees C). Lightly grease a 9x13 inch baking dish. In a large bowl, mix hash browns, ham, cream of potato soup, sour cream, and Cheddar cheese. Spread evenly into prepared dish. Sprinkle with Parmesan cheese. Bake 1 hour in the preheated oven, or until bubbly and lightly brown. Serve immediately.