Make slits every 3 inches in a leg of lamb or a rack of lamb, and insert cloves of garlic.  Rub lamb with olive oil, and season with salt and pepper, or rub with a blend of herbs.  Preheat oven to 450 - 500 degrees.  Put roast in a roasting pan, put into oven, and sear the meat until a crust forms on the outside.  (This will seal in the juices.)  Reduce oven to 300 degrees to complete the cooking.   For medium rare (140 degree internal temperature), approximately 20 min./lb. , or cook till internal temperature reaches desired degree of doneness.