Preheat the oven to 400 degrees F.
Pat the turkey breast dry, season with salt and pepper and put it in a roasting pan. Roast in the oven at 400 degrees F for 30 minutes. Baste, reduce the temperature to 325 degrees F and roast until an instant-read thermometer registers 170 degrees F, about 40 minutes. Remove the turkey breast from the oven to a cutting board. Cover with foil and let rest for 15 minutes. Carve the breast and arrange it on a serving platter. Serve with pan juices.
Reserve 1 pound of meat for another menu. Cool, wrap and refrigerate the reserved meat.
Fluff the rice with fork and add the oranges, grapes, nuts, parsley, and salt and pepper, to taste.