I haven't cooked lamb in quite a while; my girlfriend's not a fan of it, and I don't cook stuff just for myself typically. I used to make Indian (dot, not feather) leg of lamb on the grill. It called for equal parts fresh garlic and ginger and some turmeric mixed with enough lemon juice to form a paste. I'd slather it on and let it marinade for a couple of days, then grill it over a fairly hot grill. It was always a hit - except with non-lamb-eaters. I've also done lamb chops with red wine and rosemary.
Lamb has a bold flavor to it and will stand up to a lot of spices. Andy's suggestion sounds good, and there are tons of Greek recipes for lamb. Give those baby sheep back ribs a try and let us know how they turn out!