This recipe takes advantage of those smaller pieces of butterflied leg of lamb I often see at the supermarket, 2 1/2 or 3 pounds. You can also do this with a bigger one (a full leg is about 4 or 4 1/2 pounds once you take out the bones); making about one and a half times the marinade should be sufficient if you do that. And feel free to change up the marinade, as it's very adaptable – use parsley or rosemary or thyme instead of cilantro and mint, and more or less garlic or herbs according to…