Combine chicken breast pieces, onion, and celery into large non stick skillet with 1 tbsp oil, and stir fry until chicken pieces are done and onion and celery are wilted some.
Transfer all of this to a soup pot. Add the next six ingredients to the pot, stir and simmer over very low heat for about 30 minutes.
To serve, crumble tortilla chips in bowl, top with grated Monterey Jack and Cheddar cheeses, and pour soup over. The chips will soften to be tortilla consistency in the soup. You can add a dollop of sour cream and guacamole if you desire.
Recipe by FoodPhreaque at https://www.foodphreaque.com/index.php/recipe/easy-peazy-chicken-tortilla-soup/