Mix glutinous rice flour and water in a mixing bowl to make a smooth dough (clay like consistency). Scoop dough about 1 - 1 1/2tbsp, roll into ball and flatten into a patty. Set aside on a dry plate. Repeat with the rest of the dough.
Toasts 1 cup of grated coconut until golden brown and fragrant. Set aside.
Mix sugar and sesame seed.
Bring 4-5 cups of water to a boil in a pot. Drop 5-6pcs dumplings into the pot and boil until they rise and float to the top, about 1 to 3 minutes. Scoop them out with a slotted spoon and drain.
Roll the dumplings in the remaining coconut.
sprinkle generously with toasted coconut and sugar-sesame seeds mixture. Enjoy!