Brush the chicken with the butter. Place the chicken and vegetables into a 17 x 11-inch roasting pan. Season with the rosemary. Stir the stock and orange juice in a small bowl and pour half the stock mixture over the chicken and vegetables.
Roast at 375°F. for 45 minutes.
Stir the vegetables. Add the remaining stock mixture to the pan. Roast for 30 minutes or until the chicken is cooked through.