Use spearmint or Mexican yerba buena for the mint in this soup (not peppermint). My mother often puts a couple extra tablespoons of chopped fresh mint directly into the soup. If fresh mint is not available, you can use a couple teaspoons of dried mint from herbal mint tea. You can vary the vegetables depending on what you have on hand. Spring peas in their pods instead of shucked peas, for example. Or you could add some chopped fresh zucchini or corn.