Chipotle Ketchup - cooking recipe

Ingredients

1 medium sweet onion, diced
1 tablespoon olive oil
1/4 cup brown sugar
1/2 teaspoon cinnamon
1 teaspoon celery seed (optional)
1 (28 ounce) can whole tomatoes
1/2 cup apple cider vinegar
1 teaspoon molasses
1/2 teaspoon ground cloves
3 chipotle chiles in adobo
salt and pepper, to taste

Preparation

Cook onions in oil over medium-low heat until golden. Add tomatoes and juice, crushing with the back of spoon.
Stir in remaining ingredients, bring to a boil, reduce heat and simmer for 1 hour.
Puree in food processor, then return to pan ( I strained back into pan to remove any remaining small bits of chile or tomato ) and cook over low heat until it reaches your desired consistency.