Heat oven to 425°. Spray bottom and sides of jelly roll pan, 15 1/2x10 1/2x1 inch, with cooking spray. Place bell peppers, onion, zucchini, potatoes, mushrooms, oil, peppered seasoned salt and basil inlarge bowl; toss to coat. Spread vegetables in pan. Bake uncovered about 30 minutes or until crisp-tender. Cool slightly.