Remove the pork from the refrigerator and place in a warm place for 1 hour before cooking. This will aid in the even cooking of the meat.
Preheat the oven to 110°C (225°F/Gas ½). Season the pork well with salt and seal in a hot frying pan with the oil until browned. Place the pork on a wire rack and roast for 25 minutes or until the internal temperature is 54°C (129°F). Remove from the oven and rest in a warm place for 10 minutes.