01 - Preheat the oven to 400°F.
02 - Pat the lamb dry and make small incisions all over, inserting sliced garlic into each slit.
03 - Rub the lamb with olive oil, then evenly sprinkle with sea salt, black pepper, rosemary, and thyme.
04 - Place the lamb in a roasting pan and roast at 400°F for 20 minutes.
05 - Reduce oven temperature to 350°F and roast for about 1 hour or until internal temperature reaches 140°F for medium-rare.
06 - Remove the lamb from oven, cover loosely with foil, and let rest for 15 minutes before carving.
07 - Dissolve sugar in boiling water, then stir in finely chopped mint, white wine vinegar, and a pinch of sea salt. Let infuse for at least 10 minutes.
08 - Carve the lamb and serve with mint sauce and optional roasted potatoes or steamed vegetables.