Remove and use tongs to pull away the diamonds of skin and any sheets of fat that come off with them.
05Heat oven to 350 degrees F.06Dab dry with paper towels, then brush on a liberal coat of mustard, using either a basting brush or a clean paint brush (clean as in never-touched paint). Sprinkle on brown sugar, packing loosely as you go until the ham is coated. Spritz this layer lightly with bourbon, then loosely pack on as much of the crushed cookies as you can.07Insert the thermometer (don't use the old hole) and return to the oven (uncovered). Cook until interior temperature reaches 140 degrees F, approximately 1 hour.08Let the roast rest for 1/2 hour before carving.09*Cook's note: A city ham is basically any brined ham that's packed in a plastic bag, held in a refrigerated case and marked "ready to cook", "partially cooked" or "ready to serve". Better city hams are also labeled "ham in natural juices".