Grind pottu kadalai into a fine powder.Grate carrots finely. Finely shop onions and chillie.Add these to the pottu kadai powder and mix.. Using this flour, make small balls, flatten it tio form medium thick shapes and drop them in boiling oil. Turn over until they turn golden brown on all sides and become crisp. Serve immediately. If left for a while these will turn soft and will not be crisp.