Don't let the butcher sell you the whole thing; get a couple of pounds, trimmed, unless you're feeding more than a half dozen people. Cut slits in the top each half inch or so, and put a couple of slivers of garlic in there. (Three garlic cloves should be about right for the whole thing.) Marinate in:
Marinate in the refrigerator for at least 6 hours. Preheat the oven to 400 degrees F. Put some Pam on the cooking pan, and toss the marinade.
Cook it for 50 mins. and let it sit for 15 mins.
Taste the best freaking meat known to exist in the universe. Turn your little vegetarian date into a carnivore right before your very eyes.