Actually it's a simple and easy to cook dessert.
Buy the Tau Suan yellow beans. You can purchase from the
market/NTUC etc.
Add one or two cups of beans (according to your consumption) to
water and boil. Until beans are soft, (Like cooking porridge) add
in sugar to your taste. Plus a pinch of salt to make it tasty.
Finally mixed Potato Starch Flour and water. No too concentrated
starch, else you will get starch lumps.
Add in starch mixture slowly and keep stirring. Judge the thickness
yourself. As you add the starch slowly, Keep stirring at the same
time to uniform the mixtures. Once boil you are DONE. Don't forget
your Fried Fritter...You Tiao.
Enjoy.