In a big mixing bowl, mash sweet potato until smooth. Add the rest of the ingredients to the bowl then combine it until well combined. Gradually add 1 tbsp water if the mixture is too dry.

Form about ½ tbsp sweet potato mixture into a ball. Heat oil in a wok over medium heat, once the oil is hot fry the sweet potato balls in batches, making sure not to overcrowd the wok.

After the sweet potato balls expand a little and the outside part is crisp, press it with a spatula several times to make the inside of the sweet potato ball hollow.

Fry the sweet potato balls until nice and golden. Rest it on a cooling rack to remove excess oil. Enjoy!