If you think your ham or bacon hock is going to be salty, soak overnight in cold water and keep in the fridge. Drain and rinse the following day.The stew can be made to the end of step 3 ...
Drain the soaked beans and discard the water. Place the beans, ham hocks, chicken broth, and bay leaf in a soup pot; do not add salt at this stage. Bring to a boil and simmer for about 1 hour ...
Add wine, and reduce for 2 to 3 minutes. Add beans, stock, and ham hock. Cook over low heat until tender with the slightest bite. Season to taste. Fold in the grapes and set aside.