Peel and crush the garlic cloves. Gently crush the thyme and rosemary leaves to extract more flavour. Mix the garlic, thyme, rosemary, salt and 1 tablespoon of olive oil in a large bowl. Add the lamb and turn it to coat in the herbs. Leave it to marinate at room temperature for at least 30 minutes (and up to 1 hour.)
Heat the remaining 1 tablespoon of olive oil in a heavy ovenproof skillet over high heat. Add the lamb and brown on both sides (about 3 minutes per side). Transfer the skillet to a preheated moderately hot oven (Mk 6 - 400ºF - 200ºC) and roast the lamb chops to desired doneness (about 10 minutes for medium-rare). Transfer the lamb to a platter, cover, and let rest 5 minutes before serving.