Microwave Oven 30 seconds. 2. Add onion, brown sugar, pepper, salt, mustard, and catsup. 3. Heat, uncovered, in Microwave Oven 3 minutes. 4. In a 3 litre , heat-resistant, non-metallic casserole, place sauerkraut, apple and carraway seeds. Stir to combine thoroughly. 5. Dip each sparerib into sauce and place on top of sauerkraut. Pour remaining barbecue sauce over the top. Heat, covered in Microwave Oven 15 to 18 minutes. Pork should always be cooked to well-done.