Cabbage takes the place of noodles in this low-calorie soup, but if you want to add more heartiness, add 2 ounces of pasta during the last 15 minutes of cooking or add a diced potato or two along with the water. I kept the sodium low by using water instead of broth, but for a richer flavor, you can add vegetable bouillon cubes to taste or use vegetable broth for half of the water.
Preheat a large, non-stick pot. Add the onions, carrots, and celery and cook until onions soften. Add the water and all remaining ingredients except nutritional yeast, parsley, and miso. Reduce heat to medium-low, cover, and cook until vegetables are tender and broth is flavorful (at least 30 minutes).
Stir in the nutritional yeast and parsley. Place the miso in a small bowl and add some of the hot broth a little at a time, stirring, until the miso is dissolved in the broth. Add the miso broth back to the pot. Add salt to taste and serve.
This soup has zero points under the Weight Watchers Freestyle program.