Spread a light coating of Dijon mustard on entire rack, add liberal amount of dry rub (for a sweeter rib add brown sugar to rub). Wrap in plastic leave at room temp for about an hour before cooking. Low and slow 225*. When you can pick the rack up from the end with tongs and they bend at a 45 degree angle they are perfectly done. Meat pulled back from bone ends about 1/4" is also a sign of a well cooked rib. Serve sauce on the side for those who want it. You`ll be suprised how many people will pass on the sauce once they start eating.