Sweet potato and white fungus soup

Cook while you sleep! This must be the advertiser's slogan for a thermo pot!
The time is 11 pm.

And I have decided to cook sweet potato and white fungus soup for breakfast.
No worries, it can be done within 30 minutes.
Sweet potato and white fungus soup
Ingredient
2 to 3 Japanese sweet potato
white fungus (about a bowl, but then again, if you like you can always add more)
a small piece of ginger
rock sugar (to taste)
panda leaves (optional) - I was too lazy to get out of the house to cut at this wee hour!

Method
1.     Cut the sweet potato into smaller pieces or cubes. Put direct into the thermo inner pot.
2.     Pour boiling water into the pot to cover the sweet potato and about half more of  the amount of water added in.
3.     Add in the white fungus, ginger and rock sugar.

4.     Boil the pot for about 15 minutes.

5.     Put the inner pot into the thermo pot.

6.     Go to sleep.

Wake up to steaming hot and nice soup!