1, beef bones, small onions, apple pieces and cinnamon sticks are baked in the oven at 230 degrees for about 30 minutes until the beef bones are colored.
2. Then add water to stew.
3, celery, green onions, carrots, thyme, citronella together into the material bag.
4. Add the buns and stew for 4 hours, then filter out the soup head, and finally add salt and fish sauce to taste.
5. Prepare mung bean sprouts, coriander, nine-story tower and green lemon.
6. Boil the powder in the pot.
7. Put the beef in and scald it for a few minutes.
8. Take it out and eat it.