Heat a large pot over medium heat with oil. Add onion, garlic, carrots, and celery, sauté for a few minutes.

Add broth, beans and potatoes, bring to a boil then cover and simmer for 1 -2 hours (until they are soft).

Meanwhile, mix ground chicken or beef, oats, egg and soy milk. Shape into small meatballs. Prepare large frying pan, spray with cooking spray and place over high heat.

Place meatballs in the pan, cook until browned and add to the pot of soup. Cook another 30 minutes, add salt and pepper to taste. Place spinach in the soup bowls and ladle soup on top.