Beef noodle soup

Place the beef bones in a large pot, cover with cold water, and bring to a boil. Let it boil for about 5 minutes, then drain and rinse the bones to remove impurities.
In the same pot, add 2 liters of water, beef bones, onion halves, smashed garlic, ginger slices, star anise, cinnamon stick, cloves, and cardamom pod.
Bring the mixture to a boil, then reduce the heat to low and simmer for at least 1.5 to 2 hours. The longer you simmer, the richer the broth will become.
Skim off any scum that rises to the surface during simmering.
Season the broth with salt to taste.

While the broth is simmering, cook the dried noodles according to the package instructions. Drain and set aside.

In serving bowls, place a portion of cooked noodles, sliced beef, and chopped bok choy or spinach.
Ladle the hot beef broth over the noodles and beef. The hot broth will cook the beef slices.
Garnish with chopped spring onions, fresh red chilies (if you like it spicy), and cilantro leaves (if desired).
Serve with soy sauce, fish sauce, and lime wedges on the side so that each person can season their soup according to their taste.
Enjoy your homemade beef noodle soup with these metric measurements!