Take the lamb out of the fridge a couple of hours before cooking. Season the lamb all over with salt and pepper. Peel a few cloves of garlic, cut in half lengthwise and put in a roasting tin along with some sprigs of fresh rosemary. Put the lamb on top of the garlic/rosemary, add to the tin a glass of white wine and a wineglass of water, and put in the oven
Picture . Try and keep the oven at around 400°F/200°C and cook for a couple of hours.