9 boiled potatoes, mashed with milk and butter. Stir in 3 eggs, beaten. Cover potato mixture with Layer I - 3 tablespoons Parmesan cheese; Layer II - 8 ounce mozzarella cheese. Top with buttered bread crumbs and parsley. Bake at 375 degrees for 45 minutes. This dish can be refrigerated or frozen, but bring to room temperature before baking.