Cut the chicken into bite-size pieces, and set aside.
In a large soup pot heat the olive oil. Add the onion, celery and carrots. Stir to coat with oil and sauté just until they begin to lose their crispness
Add chicken broth, bay leaf, basil and parsley. Heat just to boiling
Reduce heat to simmer
Add chicken.
Meanwhile bring barley and 2 cups of water to a boil in a saucepan
Reduce heat and cover, simmer until water is absorbed, about 30 to 40 minutes
Stir barley into soup, taste for seasonings and serve.