1. Place breast, with breast bone up, in 13x9x2 inch baking pan. Roast, uncovered at 450 degrees for 20-25 minutes until skin is golden brown. Drain and discard any fat. 2. Combine 1 ½ cups cider with soy sauce and pour over turkey. Reduce oven temperature to 350 degrees. Cover turkey and roast to an internal temperature of 172-180 degrees, approximately 15-20 minutes per pound. 3. Baste occasionally with pan liquid. Blend cornstarch with remaining ½ cup cider. Stir into liquid in bottom of pan. 4. Continue to bake turkey, uncovered for 10/15 minutes until sauce thickens. Slice turkey and spoon sauce over slices.