To make BBQ Sauce: In a pot over medium high heat combine 1 cup ketchup, 1/2-3/4 cup apple cider vinegar, 1 tbsp of your spice rub and 1 tbsp maple syrup. Bring to a low boil and then drop heat to a simmer. Let simmer for about 15 minutes. Remove from heat and set aside until cool and ready to use.