Place the ham bone, water, peppercorns, bay leaves and garlic in slow cooker. Cook on LOW for 6-7 hours (or overnight) or HIGH for 3.5 hours.
Cook bacon in a large skillet over medium heat. Remove to plate. Remove some of the grease from the pan, then add chopped onion, celery, zucchini, carrots, and potato and sauté for a few minutes.
Remove ham bone and remove any meat from it. Add ham, sautéed veggies, bacon, and remaining ingredients to broth in the slow cooker. Taste and add seasonings, as needed. Cook on LOW for 2 more hours, or until potatoes are tender.
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Notes
Yield: About 9 cups soup. Serving Size: 1 1/2 cups. Stovetop Method: Add ham bone, water, peppercorns, bay leaves, and garlic to a heavy stock pot, bring to a boil, cover and simmer on low for 2 hours. Cook bacon in a skillet until crisp then remove to a plate. Add veggies to skillet; onion, celery, zucchini, carrots, and potato and sauté. Remove ham bone from pot, and cut any meat off of it. Add ham (including any from the bone), sautéed vegetables, cooked bacon, and the remaining ingredients to soup pot. Taste and add any more seasonings as needed. Cook until potatoes are tender.Make Ahead Instructions: The broth can be made several days advance, stored airtight container in the fridge. I like to chop all vegetables beforehand and keep them in the fridge until it's time to make the soup.Freezing Instructions: The broth, ham bone and ham meat can be kept in the freezer for several months. The soup can also be frozen for up to 3 months. Thaw overnight in the refrigerator then rewarm on the stove or in the slow cooker on LOW until heated.