Finely dice onion and place in a bowl

Peel and mince garlic and add to onion

Heat oil in a medium saucepan and add onion and garlic. Saute until tender, about 5 minutes

Stir in the chili sauce, chutney, vinegar, Worcestershire sauce and mustard

Bring to a boil over medium heat

Reduce heat and simmer about 10 minutes, stirring often, until thickened

Stir in hot pepper sauce and cool to room temperature

Use immediately or cool and refrigerate up to 3 days.