Prep Time: 10
Cook Time: 35
Serves: Serves: 8
Toss potatoes with butter, 1 cup cheese and ham, if desired, in medium bowl. Spray 13x9-inch baking pan with non-stick cooking spray. Spread potato mixture in pan.
Beat together eggs, milk, onion, salt and pepper in same bowl. Pour over potato mixture. Bake in preheated 350°F oven 30 minutes or until eggs are set. Top with remaining cheese and bake 5 minutes or until cheese is melted.