A traditional recipe that produces a flavorful and aromatic Vietnamese Beef Rice Noodle Soup. It does require some simmering time but produces a very flavorful and authentic tasting broth. This recipe makes enough for 10 servings, feel free to adjust the amounts if you want to make less. Or you can freeze the leftover broth in freezer safe bags or containers to have it handy for next time. ***See Notes below for an easier less fuss version using prepared stock *** Also See Notes below for a Crock-Pot / slow cooker version