Place a large soup pot over medium-high heat and add the EVOO. Add celery, carrots, onion and bay leaf and season with salt and pepper. Cook vegetables to make tender, 8-10 minutes.
Add stock, tomato sauce, beans and chickpeas, then bring soup to a boil. Stir penne into soup, cook a minute or so then stir in chicken and simmer 5-6 minutes more.
Ladle soup into bowls and garnish with some parmesan pita chips and freshly grated Parmigiano Reggiano cheese.
This is one of many “Yum-o!” recipes – it’s good and good for you. To find out more about Yum-o!, Rachael’s nonprofit organization, go to www.yum-o.org.