Boil 1l of water (I used an electric kettle to boil it). Pour the water in a bowl and add the mushrooms to re-hydrate for 20 minutes.
Add 3l of water in a pot and bring to boil over medium heat on the stove.
Add the wakame algae and turn the heat to low, leave to simmer.
Add the miso paste to a small bowl and add a few tablespoons of boiling water to it. Mix well and then pour to the pot.
After the mushrooms are re-hydrated, add them to the soup pot. Stir occasionally for 2 minutes, then turn off the heat.
Boil the udon noodles according to the package instructions (usually about 10 minutes). Drain the noodles and wash thoroughly under cold water, drain again.
Boil the eggs. I like them to be medium boiled (so I boil them for 6 minutes) then plunge them into icy-cold water for 2 minutes.
Prepare soup bowls for serving, add the miso soup with the wakame and mu-err mushrooms, then the noodles, the mung beans sprouts, the roasted chicken.
Diagonally slice the spring onion (the green part only) and garnish the soup bowls.
Season with chili salt and enjoy!