Wash large or medium sized sago and strain the water. Sprinkle 1/4 cup of water over the sago, place lid and set aside for 1 1/2 to 2 hours. Pressure cook the washed potatoes till soft. The potatoes should not be mushy but just cook till soft. Peel and grate the potatoes in a large bowl. Add the sago, arrowroot powder, coarsely ground peanut powder, chopped green chilis, coriander leaves, lemon juice, sugar, salt to taste and mix well.

Make large lemon sized balls out of the mixture and lightly flatten them. Place them in the fridge for a few minutes. Heat oil for deep frying in a heavy bottomed vessel. Once the oil turns hot, reduce flame to medium and place 3 to 4 vadas carefully in the hot oil. Deep fry till golden brown in colour and carefully remove them and place them on absorbent paper. Serve warm with chutney of your choice.