2 medium unpeeled baking potatoes, cut into 1-inch chunks
1 medium unpeeled sweet potato, cut into 1-inch chunks (1 cup)
2 medium onion, cut crosswise in half, then cut into wedges
1/3 cup fat-free Italian dressing
1/4 tsp. ground red pepper
1 medium bell pepper, cut into 1-inch squares
Move oven rack to position slightly above middle of oven. Heat oven to 500°.
Generously spray rectangular pan, 13×9×2 inches, with cooking spray. Place baking potatoes, sweet potato and onions in pan. Mix dressing and red pepper; pour over vegetables. Cover and bake 10 minutes.
Stir bell pepper into vegetables. Cover and bake 5 minutes; stir vegetables. Bake uncovered 10 minutes longer.