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Slow Cooker Marinara

Cuisine Italian
Prep Time 5 minutes
Cook Time 12 hours
Total Time 12 hours 5 minutes
Servings 6 cups


  • 8 large tomatoes quartered
  • 1/2 sweet onion roughly chopped
  • 6 cloves garlic
  • 3 T olive oil
  • 1 bay leaf
  • 2 t basil
  • 1 t oregano
  • 1 t marjoram
  • 1 t sea salt
  • 1/2 t black pepper
  • 1.5 t sugar or honey
  • 2 t Balsamic vinegar


  1. Mix all ingredients in slow cooker and set on low for 12 hours. Your kitchen will smell amazing!
  2. Process in batches in a food processor and strain through a food mill to get rid of peels and seeds - or use the handy dandy KitchenAid attachment.
  3. If the sauce is too thin, we reduce it (thicken) in a big chili or stock pot on the stovetop for about 30 minutes to an hour. I adjust seasoning at this time too.
  4. Freeze sauce in manageable amounts in zipper bags or plastic containers - or use jars in a bath canner.