This is really the only recipe I use when I grill a leg of lamb. Plan ahead, the lamb needs to marinate 24 hours or overnight. This marinade can also be used for lamb chops. A butterflied leg of lamb is with the bones removed and cut to spread open, you can ask your butcher to remove the bones and butterfly it for you. If you prefer a more lemony taste then thinly slice half of another lemon, leave the peel on, and just throw the slices inside the bag or bowl with along with the other marinade. If desired you can also stuff the lamb with garlic cloves as well as adding the minced garlic in with the marinade. Grilling time depends on size of lamb. This recipe produces an excellent grilled lamb that melts in your mouth, try to not overcook the lamb, for best results leave slightly pink in the middle.