Mix the sugar and the pandan flavored water and mix until sugar is dissolved. mix in the cassava and then add the lye water drop by drop mixing well as you do so.
Pour into a mold or bowl that fits your bamboo steamer. steam until the mixture becomes translucent.
While still hot scoop out the cooked mixture (use ice cream scoop or a tablespoon the same size as the scoop) and roll into grated coconut.