Vietnamese beef pho

Steps

1. Simmer the stock with sliced onion, ginger, a cinnamon stick and a star anise for 10 minutes.
2. Soak the rice noodles in hot water for 6 minutes and drain.
3. Slice the beef as thinly as possible.
4. Put the noodles and bok choy in a bowl, add the raw beef and ladle the boiling broth over it; the beef cooks in the hot soup.