Note from my friend, "There are 3 types of beancurd sheets. Got to be careful when getting the right kind, the one for dessert soup [is the one you need]. Otherwise it'll turn out very different and disappointing."
Note from my friend, "For the ginkgo nuts, remember to remove the center core which is bitter."
Soak the 3 sheets soft beancurd skin in water until soft.
Wash and drain 100g barley then add to a pot with 8 1/2 cups boiling water. Add the 4 pandan leaves (tied into a knot) and the rock sugar (adjust to preference).
Boil for 25-30 minutes until barley becomes soft, and remove pandan leaves.
Tear soaked beancurd skin into small pieces and add to pot.
Add 100g gingko nuts (shelled and seeds removed) and stir in 2 egg whites, and the quail eggs if using.
Simmer for 15 minutes, stirring. Serve hot or chilled to preference.