In a large pot over medium heat, combine chicken broth, spinach, onions, carrots, and celery. Mix well and allow to simmer.
In a separate large bowl, combine ground beef, bread crumbs, and egg and mix well. Form mixture into 1/2-inch diameter meatballs and carefully drop them into the soup.
Put chunks of chicken breast into soup and reduce heat to low. Allow soup to simmer for 1 hour. Add pasta 30 minutes before serving and season with salt and pepper to taste.
