Step 1

Add ginger and oyster mushroom into the water and bring to boil over medium-high heat (takes about 7 minutes for me).

Step 2

Add salt and keep boiling for another 2 minutes.

Step 3

Turn to medium heat, gently pour the egg around the pan and wait for about 1 minute until the egg starts to turn solid, add the green onion into the pan, and stir a little bit.

Step 4

Pour the soup into a container, drizzle with a touch of sesame oil and sprinkle with some white pepper powder to serve.