Drain and discard marinade. Place roast, fat side up, on a rack in a shallow roasting pan. Bake, uncovered, in 350°F (180°C) oven for around 1 hour and 10 minutes, or until juices run clear when pork is pierced and just a hint of pink remains inside, or thermometer inserted into centre of roast registers 160°F (71°C). Let stand, loosely covered in aluminum foil, for 10 minutes before thinly slicing.