1Heat oven to 425°F. Spray 13x9-inch pan with cooking spray.
2In shallow dish, mix Bisquick mix and pepper. Into another shallow dish, pour 1/2 cup of the dressing. Coat chicken with dressing, then coat with Bisquick mixture, pressing so coating sticks to chicken. Place in pan. Drizzle with butter.
3Bake uncovered about 30 minutes or until juice of chicken is clear when center of thickest part is cut (170°F).
4Meanwhile, cook corn as directed on bag; drain. Stir remaining 1/4 cup dressing into corn. Spoon warm corn relish onto serving plate. Arrange chicken on corn.