Combine rice and 2 quarts of water. Cover steam or bake until water is absorbed, approximate 20 minutes
Heat oil in skillet. Sauté onions, carrots and celery until onions are translucent, approximately 5 minutes
Add water and chicken base, bring to boil. Reduce heat and simmer for 15 minutes
Add chicken, sage, pepper and thyme. Skim the soup
Combine cornstarch with water and add to soup
Bring to boil, reduce heat and simmer 15 minutes
Finish with parsley and season to taste with salt
Add cooked rice to soup just before serving