If using a frozen turkey breast roast (like Butterball), cook it from frozen, per package instructions. Preheat oven to 325°F. Place frozen turkey breast (netting still on) on rack in shallow roasting pan. Brush with oil. Cook uncovered for 3 1/2 hours. Brush the maple glaze over roast and continue cooking for 30 minutes more or golden brown and meat thermometer reads 165°F. Let stand for 10 to 15 minutes before removing the netting and slicing. Simmer the glaze as directed above.