Preheat the oven to 350.  Pour about 1/4 cup salad dressing on the underside of the chicken and massage in.  Pour about 1/2 a cup salad dressing over the top of the chicken, reserving about 1/4 cup.  Roast the chicken in the oven until it just starts to brown and baste with remaining salad dressing, about an hour.

Finish roasting the chicken for about another 30 minutes or until the juices in the thickest part of the breast run clear.  Let the chicken rest for about 10 minutes before serving.