In a medium roasting pan, heat the remaining 1 tablespoon of olive oil. Add the roast and brown it well on all sides over moderate heat, turning with tongs, about 5 minutes. Turn the roast fat side up. Transfer the pan to the oven and roast the meat for 35 minutes, or until an instant-read thermometer inserted in the thinner end registers 120° for medium-rare meat. Transfer the roast to a cutting board and let rest for 20 minutes.