Prepare dry rub by mixing all ingredients together in a small bowl.
Prepare BBQ sauce by heating garlic powder, chili powder, smoked paprika and cumin in oil over medium heat for 30 seconds until fragrant. Add remaining ingredients and let simmer for 5 minutes and then set aside.
Remove the thin membrane from the back of the ribs.
Coat all sides of ribs with the dry rub and let sit for 30 minutes at room temperature.
Wrap ribs with foil, adding 2-3 ice cubes in with the ribs. Grill indirect low heat (~300°F) for 1½- 2 hours. 10 minutes before they are done, remove the ribs from foil and brush with BBQ sauce and grill 3- 4 minutes each side to caramelize the sauce. Let rest 20 minutes before slicing.
Plating: Brush plastic skull with BBQ sauce and arrange it with the ribs on assorted greens. I used baby arugula, pea sprouts, and enoki mushrooms. Happy Halloween!