While the ribs are cooking, warm the oil in a medium-sized saucepan over medium-low heat. Add the onion and cook, stirring occasionally, until softened, 8 to 10 minutes. Stir in the garlic and chile and cook for 4 minutes more.
Pour in the vinegar, sugar, pureed tomatoes, lemon juice, maple syrup, mustard, Worcestershire sauce, and bourbon. Stir to combine.
Bring the sauce mixture to a boil, then reduce the heat to maintain a simmer, and cook until thickened, 20 to 30 minutes. Season to taste with salt and pepper, then set the sauce aside to cool.