1. Rub the oil all over the lamb on a shallow roasting pan. Sprinkle with the rosemary and season generously with salt and pepper. Pat the seasonings on to adhere. Let sit while the oven heats. 2. Preheat the oven to 475°F. 3. Roast the lamb for 15 minutes. Reduce the oven temperature to 375°F and continue roasting the lamb until an instant-read thermometer inserted into the rack, away from the bone, registers 135°F for medium-rare, about 13 minutes. Transfer the lamb to a carving board, cover loosely with aluminum foil and let rest for 5 minutes. 4. Meanwhile, in a small saucepan, bring the bourbon to a boil. Boil until reduced by half, then add the jelly and vinegar. Adjust the heat to maintain a simmer and simmer, stirring occasionally, until the vinegar burns off and the jelly is melted. 5. Cut the lamb into chops. Sprinkle the mint leaves on top and serve with the bourbon mint sauce.