1. Prepare potatoes according to pkg. directions, using milk and sour cream. Stir in caraway seed, Cheddar cheese and sauerkraut. Mix well.
2. Spray 2 qt. microwave-safe casserole dish with nonstick cooking spray. Spoon half of potato mixture into dish. Top with corned beef, chopped tomato and Havarti cheese. Top with remaining potato mixture. Cover.
3. Microwave on high for 14 to 18 min. or until casserole is thoroughly heated and cheese is melted. (Conventional oven: 350°F for 45 min.) Sprinkle with parsley.