In blender container or spice grinder, blend together well the pepper, fennel, sage and salt. Rub about 2 tablespoons rub, or to taste, over all surfaces of ribs. Store any remaining rub in tightly covered jar.
Prepare banked fire in covered kettle-style grill. Grill ribs over indirect heat, turning a couple of times, for about 2 hours, until meat is very tender. Can also be braised in the oven for 60-90 minutes and then finished on the grill.
