Peel and dice potatoes into 1/2" cubes.Place in a 4 cup glass measure;add water.Cover with plastic wrap, venting spout area. Microwave on high 6 to 7 minutes.Set aside. Place onion and bacon drippings in a 2 qt. Casserole.Cover with lid or plastic wrap and microwave on high 2 to 3 minutes or until onion is tender.Stir in potatoes, corned beef, beets, milk and parsley.Add salt and pepper to taste.Microwave on high 3 minutes or to desired temperature.If desired, mixture may be browned in a skillet on conventional range top in lieu of final reheating in microwave.Makes 4 servings.