Chipotle BBQ Sauce

Name: Chipotle BBQ Sauce
Ingredients: 1 tablespoon canola oil; 2 cups diced yellow onion; 7 cloves garlic, minced; 1 cup ketchup; 1 cup chipotle Red Chile Paste, recipe follows; 1/2 cup Worcestershire sauce; 1/2 cup strong coffee; 1/3 cup packed brown sugar; 1/4 cup cider vinegar; 1/4 cup freshly squeezed lemon juice; 1 1/2 teaspoons Dijon mustard; 2 teaspoons kosher salt; 4 ancho chiles, seeded and stems removed; 4 Mexican dried chiles, seeded and stems removed; 3 cups chicken stock; 1/2 white onion, diced; 3 cloves garlic, minced; 2 chipotle peppers, seeded and stems removed