Our approach to soup is very, very forgiving. The key take away here is not the vegetable ingredients, you can use whatever you have on hand. Instead what makes the soup special is it's use of added minerals. The calcium, magnesium, potassium mix we add to the broth seems to compensate for the lack of added salt in the dish. Before experimenting with added minerals, our SOS-free soups always tasted flat and watery. Now they have the body of "normal" soup. Yum.