This easy crock pot cabbage soup is light and flavorful. The soup is loaded with vegetables, including cabbage, zucchini, carrots, and spinach. It is a healthy choice and you'll often see similar recipes called detox soup. It can be the antidote to a season of overeating and overindulging. You can have it for a light meal or starter course and even freeze portions to have on hand. It's a meatless soup but it's made with french onion soup, which has a beef stock base. If you prefer a vegetarian soup, replace the french onion soup with vegetable broth and chopped onions or minced dried onions. For a gluten-free soup, ensure that the french onion soup you choose is gluten-free. You can make many variations on this soup. It's a great way to use up "Aspirational vegetables" That you bought at the farmers market but are nearing the end of their usable period in your refrigerator. It's also something to do with an overabundance of zucchini from your garden.