Add all of the remaining ingredients, stirring gently to combine.
If the liquid doesn't quite cover the beans, add more boiling water- just enough until it does.
Cover the slow cooker with it's lid, and cook on low heat for 6-8 hours.
Stir, and remove any bones and the bay leaf. Serve immediately.
Notes
Don't have any ham bones handy? You can sub in several strips of thick cut bacon. You could also add in regular diced ham if wanted. It's just about getting the meat in some form in there to infuse the beans with the flavor.