Mustard and Thyme Barbecue Sauce Starring Beer

Ingredients

• 1 (12 ounce) bottle light beer
• 1 onion, finely chopped
• 2 tablespoons brown sugar
• 2 tablespoons Dijon mustard
• 2 tablespoons tomato paste
• 2 teaspoons dried thyme
• 2 teaspoons beef bouillon granules
• 1 bay leaf
• 1 teaspoon salt
• 1/4 teaspoon pepper