Instructables
Making Vietnames Bun is an art. 
There are a lot of things that you can do wrong.
This instructable is to get you going and to help you avoid some common mistakes.

Here is what you will need:

1 medium soup pot - half full of water
2 bags of Bun -Rice Vermicelli (noodles)
A collander for straining
1 pair of Chopsticks
A clean sink with open drain!
  • To get started, fill a medium sized pot half way with water and place on the stove on high heat.  Bring to the boil.
  • While the water is coming to the boil, be sure that your sink, its trap and disposal are clean so that water will drain without obstruction.  A sink with too much in the disposal may cause the water will raise to the bottom of the collander and touch the noodles.  We want to avoid this. 
  • Once the water is boiling - add bun.  Make sure the bun is covered by the water.
* If you have not used a certain brand before, take it out of the bag and make sure that it has all ties removed and there are no silicone bags in it.  Opening an unfamiliar brand over a boiling pot, you may find silicone preservation bags between bunches of noodles.
  • Make sure that the bun is covered by water and wait for it to return to the boil - DO NOT STIR OR COVER!
  • Once the water returns to the boil, gently stir or swirl bun with a couple of quick strokes.
  • The bun should only boil for about 2-2.5 minutes after the water has once again reached boiling.
  • Try a noodle to see that it is cooked through.  (Not too soft and not au dente)
  • Place collander in clean sink with cold water running.
* If there are obstructions to water draining, it make back up the sink and spoil your noodles.
  • Pour out hot water first.
  • Strain the bun and wash gently, turning with chopsticks while running cold water - making sure that you are reaching the middle and the bottom to completely stop the cooking.
  • Once cooled, place the collander inside pot it was boiled to rest 10-15 minutes before serving!