1. Heat a medium sized pot over low heat. Add olive oil and onions. Cook until translucent, approximately 10 minutes.
2. Add onions and remaining ingredients except for lemon juice to a slow cooker*. Turn slow cooker on high and allow to simmer for 3-4 hours.
3. Remove spice sachet and set aside. Puree mixture with an immersion blender.
4. Replace spice sachet and continue to cook for 3-4 hours. Taste (don’t burn your tongue!) and adjust salt, pepper, vinegar, or sugar as you see fit.
5. Continue cooking and tasting until tomato is of ketchup consistency. This may take an additional 3-4 hours.
6. Ladle hot ketchup into sterile jars with one half teaspoon lemon juice per pint. Wipe rims, place on two part lids, and process in a water bath for 35 minutes/pints, 40 minutes/quarts. Remove from water bath, cool, and store properly.
*Don’t have a slow cooker? Use a medium pot on low heat, uncovered, and stir frequently to be sure the bottom does not burn.
This post, with much respect for the A Prairie Home Companion, is brought to you by the Ketchup Advisory Board.
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