My dad used to make a variation of this soup when I was a little girl. I think this was just one of his made up recipes as my dad never completely followed any recipe. It is a great main course soup and is quick, tasty, and easy to make. Pork can be substituted with chopped chicken. Hamburger is not recommended since it has little flavor. Also, try to get Asian dried shitake mushrooms, as the organic shitake mushrooms lack flavor.