Preheat the oven to 425 F. When it is hot, place the pork into the oven, uncovered, and roast for about 25 minutes, until the internal temperature of the pork is 145 F (the USDA always recommends 160 F I think so follow my advice at your own risk--trichinosis is not a problem in this country and the pork temperature will rise to 160 F while sitting anyway). Remove from the oven and let stand for 10-15 minutes, tented with foil. Slice at an angle and serve.