This classic Vietnamese soup already contains antioxidants, vitamins, and minerals, and with the addition of beef bone broth, you get even more nutrients thanks to the beneficial protein, collagen.
Over medium heat, bring the broth to a boil and add the noodles. Cook until the noodles are soft and translucent (check noodle package for the approximate cooking time because they can vary greatly). Immediately remove from the heat and split the noodles and broth evenly between two bowls.