Place chicken on rack in large roasting pan. Roast 15 minutes at 425°F, then reduce heat to 350°F. Baste chicken with pan juices, then add potatoes, carrots and onions to pan. Continue roasting chicken, basting every 20 minutes, until juices run clear, legs move easily when wiggled and meat thermometer inserted into thickest part of thigh registers 170°F. This will take about 2 1/2 to 3 hours for a 5- to 7-pound PERDUE® OVEN STUFFER® Whole Roaster.