Prep Time: 20 minutes
Cook Time: 3 hours, 30 minutes
Trim excess fat from beef ribs. Combine salt, pepper and cayenne. Rub over the ribs. Preheat grill and prepare for indirect grilling with a drip pan. Place ribs on grill over drip pan and close the lid. Cook for about 3 to 3 1/2 hours over a medium low, indirect heat (try to keep the temperature under 265°).
To prepare sauce combine onion, honey, ketchup, Worcestershire sauce, soy sauce, garlic and mustard in a sauce pan. Heat over a low temperature, stirring until even and warm. When the ribs are nearly finished begin brushing the sauce on them until you get a thick coating.