This healthy, flavorful soup is loaded with tons of fresh, nutritious ingredients like spinach, carrots, celery, and onion and simmers in a slow cooker while you're away at work so it tastes like it cooked all day — because it did.
See all orzo recipes.
Combine all of the ingredients except for the spinach, orzo, and Parmesan in a slow cooker. Cook on low for 7-9 hours or on high for 5-6 hours. About 1 hour before the chicken is done, shred the chicken with a fork. Meanwhile, bring a large pot of water to a boil and cook the orzo pasta according to the package directions.
About 5 minutes before serving, add the spinach and orzo pasta. Wait for the spinach to wilt. Top the soup with a little Parmesan cheese, if using.