28 oz. can, diced tomatoes, ½ cup apple cider vinegar, ½ cup natural sweetener, 1 tsp. garlic granules, 1 tsp. onion granules, 1 tsp. ground mustard, 1 tsp. paprika, ½ tsp. cinnamon, ⅛ tsp. allspice, ⅛ tsp. cloves, ½ tsp. celery seed, ½ tsp. ground black pepper, ½ tsp. salt
In a large saucepan, combine crushed tomatoes, apple cider vinegar, and sweetener. Whisk well.
28 oz. can, diced tomatoes, ½ cup apple cider vinegar, ½ cup natural sweetener
Add all the spices and whisk again.
1 tsp. garlic granules, 1 tsp. onion granules, 1 tsp. ground mustard, 1 tsp. paprika, ½ tsp. cinnamon, ⅛ tsp. allspice, ⅛ tsp. cloves, ½ tsp. celery seed, ½ tsp. ground black pepper, ½ tsp. salt
Bring the ketchup to a simmer over medium heat, then reduce the heat to low so it barely bubbles. Let the ketchup simmer uncovered for about 1 to 1½ hours, stirring occasionally. The ketchup should thicken and cook down by half. Once the ketchup is as thick as you like it, remove it from the heat and let it cool.
Transfer the ketchup to a blender or use an immersion blender to blend it until it's completely smooth. Taste and adjust.
Pour the ketchup into a storage jar and keep it in the fridge.
Notes
Please note that the nutrition data below is a ballpark figure. Exact data is not possible.