First, skin your yellow or orange sweet potatoes I practically used the chopper to break the potatoes it’ll give it better flavour and put it into boiling water until softened

In a separate saucepan boil some water and throw in your sago beans until only HALF COOKED - (not fully translucent)

While waiting cut your purple sweet potatoes into cubes and steam them on high heat for 10 minutes

Now your sago is ready sieve it and cool with some water add your ginger into the soup you were making earlier and add the sago

Mash the steamed and softened purple sweet potatoes and add sugar in it

Transfer that paste to the tapioca starch and start kneading, after all the tapioca starch is incorporated add 3-4 tbsp of water and keep kneading

You will reach this wet like, but dry at the same time workable dough, cut your dough into a few parts roll it out and make little balls like.. boba size you know

Now - a whole bowl of sweet potato boba don’t forget to dust them with more starch if not they’ll stick add them into boiling water for 10 minutes

Add your sweetened melon, addsugar to taste and add a dash of coconut milk

Boba should be ready now and transferred into a bowl with cold water..