Succulent Leg of Lamb for the Slow Cooker / Crock-Pot

A throw-it-all-in recipe. Ingredient-list gleaned from various lamb recipes I've used in the past, with a minty twist! ( I have a ridiculously not-hot crock-pot, so I was able to fix-it-and-forget-it for ten hours. By then it was well and truly falling off the bone. Lovely! My crock-pot is also incredibly small, so the lamb was half-submerged in the marinade. If yours is not, you might do well to baste the meat half-way through, if possible. I covered the exposed meat with the left-over lemon skins (yellow-side up) to avoid scorching on top.]