You can easily convert this recipe to a slow cooker recipe instead! All you'll need to do is sauté the vegetables and ham on the stove top first, then transfer it into a slow cooker.  Preheat a medium pot over medium heat and add oil, onions, celery, and carrots and sauté until veggies soften and start to turn golden. Press in the garlic and sauté until fragrant. Add diced ham, stir, and sauté for a couple of minutes. Transfer it all into a slow cooker. Add ham bone if using. Add beans, chicken broth, thyme, bay leaf, crushed red peppers, and salt. Don’t forget to taste to make sure you have enough salt. Close the lid and set it to cook on LOW for 8-10 hours (until beans are tender).