Spray 3 1/2- to 4-quart slow cooker with cooking spray. Remove fat from pork. Rub jerk seasoning over pork; sprinkle with thyme. Place pork in slow cooker. Sprinkle with onion. Pour cola over pork. Cover; cook on Low heat setting 8 to 10 hours. Remove pork from slow cooker; reserve 1/2 cup juices.
I had such success with my slow cooker french dip the other week, I couldn't wait until I had the opportunity to break out my slow cooker again for another dish. My trip to Dallas put me in the mood for some barbecue and I decided to try and adapt one of my favorite recipes to the slow cooker: