"Don't throw away the ham bone -- make bean soup! Plan a little bit ahead and use a ham bone to make this gluten-free soup. With just a few basic ingredients you can create a delicious comforting meal from leftovers."
Place bean mix into a large bowl and cover with several inches of water; soak for at least 24 hours. Drain completely.
Bring chicken stock to a boil in a pot large enough to hold the beans and, eventually, the ham bone. Add the soaked beans; reduce heat and simmer until tender, about 1 hour.
Bring stock and beans back to a boil. Add ham bone, onion, carrots, celery, garlic, and bay leaves. Reduce heat to low and simmer until vegetables are soft, about 1 hour. Add chopped ham, liquid smoke, and mustard powder. Stir and let simmer until flavors blend, about 30 minutes more.
Remove ham bone from the soup. Season with salt and pepper.