01 -
Preheat the oven to 375 degrees F (190 degrees C). Lightly grease a 9x13-inch baking dish with cooking spray.
02 -
Mix together hash browns, condensed soup, sour cream, Cheddar cheese, and ham in a bowl until well combined.
03 -
Spread the mixture evenly into the prepared dish. Sprinkle with Parmesan cheese.
04 -
Bake in the preheated oven until bubbly and lightly browned, about 1 hour.