PORK CHOPS: Combine all ingredients except chops in a shallow plate. Brush chops with olive oil and dredge them in seasonings mixture, gently pressing it onto meat. Transfer chops to a platter and cover and refrigerate for 2 hours. Preheat grill to high heat. Place chops on the grill and cook 5-6 minutes per side or according to desired doneness, brushing with BBQ sauce often. Remove chops to a clean platter and loosely tent with foil to rest.
BBQ SAUCE: Saute onion and garlic in oil in a saucepan over medium heat. When it's soft add remaining ingredients and simmer for 20 minutes.