In the same pan, brown the onion and bacon. Add oil as needed. Add the garlic and mustard and cook gently for about 1 minute. Return the meat to the pan and add the remaining ingredients, except for the beans. Bring to a boil. Cover and bake for about 1 hour and 30 minutes. Add the beans and cook, covered, for about 1 hour or until the meat is fork tender. Remove the sage. Adjust the seasoning.