1. Scrub potatoes; cut crosswise into 1/4 in. Slices. Place in 1 1/2 qt. Microwave safe casserole. Add water and salt. COver with lid. Microwave on high for 9-10 min. Or until potatoes are tender; stirring once. Drain and cool.
2. Add onions, olives, green pepper, tomato, dressing and parsley. Mix lightly to coat evenly. Refrigerate until chilled. Stir before serving and sprinkle with cheese.