To prepare a spatchcocked butter roasted lemon and herb turkey with gravy recipe, first you will need to prepare your turkey. First, remove the skin from the turkey and slice it in half lengthwise. Then, place the cut side down on the cutting board. Place the sliced turkey in the roasting pan and roast it at 450 degrees F (232 degrees C) for 1 to 2 hours, or until the meat reaches an internal temperature of 165 degrees Fahrenheit (73 degrees Celsius).