Remove the membrane from the back of the ribs for extra tenderness.
Rub the ribs with mustard, then apply the BBQ seasoning rub evenly.
Let the ribs rest for at least 30 minutes or refrigerate overnight for deeper flavor.
Cook using your preferred method: Grill at 275°F (135°C) for 2.5-3 hours, Bake at 300°F (150°C) wrapped in foil for 2.5 hours, or Smoke at 225°F (107°C) for 5-6 hours.
In the last 30 minutes, brush the ribs with BBQ sauce, letting it caramelize.
Remove the ribs, let them rest for 10 minutes, then slice and serve.