To make the cabbage turkey meatballs soup: heat olive oil in a large pot over medium heat and cook onion, stirring regularly until fragrant and translucent.
Add shredded cabbage and give a good stir to coat with oil. Cook for a couple of minutes, stirring from time to time.
Add chicken or vegetable broth and marinara sauce, season with pepper, cayenne, and Italian seasoning. Bring the soup to a simmer and cook, semi-covered for 15-20 minutes.
Add the cooked turkey meatballs to the cabbage soup and cook for 5 to 10 minutes more. Serve the cabbage turkey meatballs soup with cilantro on top, and gratted cheese if you like. Enjoy!
