Peel plantains and split into half lengthwise.Cut each portion into 1-cm thick half circles.
Heat oil in a kadhai and deep fry chips in batches till crisp and golden.Remove from oil,drain and allow to cool.
Mix jaggery syrup,ginger powder and sugar in a pan,and cook till syrup reaches the soft-ball stage.(A little syrup poured into a cup of cold water forms a soft ball.)
Add fried chips,mix well to coat evenly,remove from syrup and spread on a tray to dry.