*For a lighter version, you may substitute milk but only use 1/4 cup and add more as needed to meatball mixture.
**You may substitute milk or half and half, but keep in mind the higher the fat content, the creamier the soup. You can add more sour cream at the end of cooking to help creamify.
***For a less "chunky" soup, add more beef broth and/or heavy cream/milk.