"This minestrone soup is the best low-carb comfort soup for a chilly day! Instead of kidney beans or great northern beans, this recipe uses a unique, low carb bean – the lupini bean."
3. Add chicken broth or vegetable broth, 1 teaspoon salt, zucchini, tomatoes and parmesan rind. Bring to boil, then reduce heat to a simmer. Let cook uncovered until vegetables are tender (at least 20 minutes). The longer you let the soup simmer, the more flavor the parmesan rind will release.