Grilled or Roast Leg of Lamb with Thyme and Orange

How wonderful is the marriage between thyme and lamb? So wonderful that this dish conjures up visions of Greeks spit-roasting lamb or goat on rocky hills above the sea, basting it with branches of thyme dipped in olive oil. (Which is not a bad recipe itself, especially if you have the rocky hills and sea.) This lamb is lovely with a rice dish or simply with bread.

Note, interestingly, that this recipe is virtually the same as the one that follows—except the flavors are distinctly di