Preheat oven to 400°F. Place the half bunch of stemmed and finely chopped mint in the middle of the splayed-out lamb.
Place the garlic in among the mint leaves then fold the lamb over so that the mint and garlic are almost entirely cocooned in the lamb. Place the lamb in a shallow baking pan on a roasting rack and drizzle evenly with EVOO. Season both sides with salt and freshly ground black pepper. Place in the oven for 45 minutes. Remove from the oven, cover with foil and let the meat rest for 5-10 minutes for the juices to redistribute.