Sprinkle turkey breast evenly with salt and pepper.
Stir together butter, rosemary, and sage. Loosen skin from turkey without detaching it; spread butter mixture under skin. Arrange one-fourth of orange and lemon slices over butter mixture. Gently pull skin over fruit. Coat with cooking spray. Place turkey in an aluminum foil-lined baking pan coated with cooking spray. Place onion and remaining orange and lemon slices in pan. Drizzle with wine.
Bake at 325° for 2 hours and 15 minutes or until a meat thermometer inserted in thickest portion registers 170°, basting every 30 minutes.
Cover loosely with aluminum foil coated with cooking spray to prevent excessive browning after 1 hour and 30 minutes, if necessary.