1 (15 oz) can pureed tomatoes
1 small onion, peeled and quartered
1/2 cup apple cider vinegar
1/2 cup brown sugar
3 tbsp tomato paste
1 cinnamon stick
1/4 tsp salt
- In a medium saucepan combine all of the ingredients and stir to combine. Cook over low heat for 1 hour.
- Remove from heat and let cool completely.
- Remove the cinnamon and onion and store in an airtight container.