1 1/2 c. (15 oz. can) tomato puree
1/2 c. cider vinegar
1/4 c. honey
1 tbsp. chopped onion
1/2 tsp. dry mustard
1/2 tsp. ground cinnamon
1/2 tsp. ground allspice
1/2 tsp. celery seed
1/4 tsp. pepper
1/8 tsp. garlic powder
Pinch of cayenne pepper

Combine all ingredients in a medium saucepan, bring to a boil. Reduce heat to low and simmer for 15 minutes. Store in a covered container in the refrigerator. Stir before using.