Scrub potatoes; cut crosswise into ¼ in. slices. Place in 1 ½ qt. microwave safe casserole. Add water and salt. Cover with lid. Microwave on high for 9–10 minutes. or until potatoes are tender; stirring once. Drain and cool. Add onions, green pepper, tomato, dressing and parsley. Mix lightly to coat evenly. Refrigerate until chilled. Stir before serving and sprinkle with Cheese