Cajun BBQ Sauce

1/2 cup butter
Small onion diced
4 cloves garlic
2 cups tomato sauce
1 tbsp steens
2 tbsp creole mustard
2 tbsp Apple cider vinegar
1 tbsp Worcestershire
2 tsp black pepper
1 tsp Cajun seasoning
1 tsp Cayenne
1 cup broth

Melt butter in a small pot add onion and cook till translucent. Add garlic and cook for 30 seconds. Add the remaining ingredients and bring to a simmer Simmer till mixture thickens about 30 minutes