Using low sodium broth, canned tomatoes and paste help make this a bit healthier. Feel free to use different ground meat in place of the beef, and a different broth in place of the beef. They add a wonderful depth of flavor, so if using turkey or chicken, know that it will taste lighter. Since the soup simmers with the zucchini for a bit, make sure the pieces aren't too small as they'll become mushy. If you need to save time and don't have the canned tomatoes and paste, feel free to sub your favorite spaghetti sauce. I love Rao's in a pinch.