Steps

1. Turn the oven on to broil
2. Chop the onion in half
3. Skin the ginger and cut in half
4. Broil onion and ginger for 15 minutes
5. Briefly toast all of the spices for a minute
6. Fill the stock pot full of water
7. Bring to a boil
8. Add the bones into the hot water for 10 minutes (parboil)
9. Drain the water
10. Fill astock pot with cold water with the bones
11. Put the fennel seeds, cardamom, coriander, and star anise in a tea container.
12. Add the tea container to the pot
13. Add fish sauce
14. Add rock sugar
15. Add the cinnamon stick
16. Skim the fat
17. Simmer for 3 hours