Heat the oil in a medium pot over medium heat. Add the chopped onion and garlic and saute, stirring frequently, until the onions are translucent and slightly golden brown, about 5 minutes. Add the bourbon, and simmer for 2-3 minutes. Stir in the tomato paste, and cook for an additional 2-3 minutes or until the paste darkens slightly. Add the prune purée, Worcestershire sauce, soy sauce, maple syrup, apple cider vinegar, dijon mustard, paprika, salt, and pepper. Whisk to combine.