The night before or several hours before dinner, mix together the rub spices.
Spread yellow mustard all over the rack of ribs and apply the rub. Cover and refrigerate. Let it come back to room temp before cooking.
Light the fire and let it die down. Put the meat on the grill off to the side, where it will get indirect heat. Put the cover down and let it cook at least four hours.
Add salt and pepper, then separate the ribs and enjoy.