Preheat oven to 425°F. Wash potatoes; pat dry with paper towels. Cut potatoes and put in a large bowl. Add dressing and parmesan cheese; toss well. Arrange potatoes in single layer on 2 large baking sheets coated with cooking spray. spray potatoes with cooking spray. Bake 12 minutes. Turn potatoes over. Continue baking 10 to 12 minutes or until golden brown and crisp.