Add first 15 ingredients to 6 quart or larger slow cooker. Stir to combine, cover, and cook on LOW for 6-8 hours, or HIGH for 3-4 hours.
30 minutes before you want to serve the soup, add zucchini and ditalini pasta, stir, cover and cook on HIGH for 20-25 minutes.
5 minutes before serving, add in frozen green beans and baby spinach, stir, cover and cook on HIGH for 5 minutes.
When serving, if desired, grate parmesan cheese over the soup and enjoy!
