Vietnamese Chicken Noodle Soup (Phở Gà)

Vietnamese chicken noodle soup, or Phở Gà (pronounced Fuh), is a deeply flavored broth with wide rice noodles and chicken, topped with fresh herbs. The key to perfectly cooked chicken is to bring it to a boil to skim off any scum, and then lower the heat to a very gentle low simmer to cook the chicken "low and slow" in order to create very tender meat. Smaller chickens will need less time. Be careful not to overcook the chicken or it becomes pasty and stringy. However, not allowing it to cook long enough does not allow the flavors in the broth to develop. I usually watch it, and when the chicken just begins to fall apart, I turn off the heat and strain it. Follow my directions below for creating another batch of stock once you pull all of the chicken meat from the bones; you should get about 6 quarts total of delicious pho broth by the time you are done.