Put tapioca cubes into boiling
water and cook until transparent.
Rinse.
Bring 8 cups of water to the boil.
Add Job's tears and cook for 1/2
hours.
Add water chestnuts, gingkoes and
red dates.
Cook for 15 more minutes.
Add rock sugar and cook until it
melts.
Add tapioca cubes and bring to the
boil again.
Serve.
Except tapioca cubes and Job's tears,
feel free to improvise with other ingredients. For instance, leftover
candied lotus seed and lotus root from the candy tray work just fine.