South Carolina Mustard Style Barbecue Sauce

1 teaspoon oil
1 tablespoon grated onion
2 garlic cloves, minced
1 cup yellow mustard
½ cup apple cider vinegar
¼ cup honey
2 tablespoons brown sugar
1 teaspoon Worcestershire sauce
1 teaspoon lemon juice
1 teaspoon black pepper
1 teaspoon red pepper flakes
½ teaspoon celery seeds
1 teaspoon hot sauce

Place a saucepan over medium heat and add the oil. Add the onion and garlic and sauté for 2 minutes, stirring frequently. Whisk in the remaining ingredients, stirring well to combine. Cook over medium heat until bubbles break the surface. Reduce the heat to low and simmer for 10 minutes. Serve immediately.

Any remaining sauce should be left to cool to room temperature, then store in an airtight container, refrigerated.