01 - Preheat your oven to 400°F.
02 - Use a sharp knife to make small incisions all over the lamb. Insert a slice of garlic into each incision.
03 - In a small bowl, mix olive oil, rosemary, thyme, salt, and pepper. Rub this mixture thoroughly over the lamb.
04 - Place the lamb on a rack in a roasting pan. Roast for about 1 hour 30 minutes for medium-rare (internal temp 140°F), basting once or twice.
05 - Place the chopped mint and sugar in a heatproof bowl. Pour over the boiling water, stir, and let stand for 5 minutes. Stir in the vinegar and a pinch of salt. Adjust seasoning to taste.
06 - Once the lamb is done, transfer to a carving board. Loosely cover with foil and let rest for 15 minutes before carving.
07 - Serve the lamb sliced, accompanied by the mint sauce and roasted vegetables.