Wash and soak the urad Dal overnight and grind to a fine paste by adding very little water. The batter should be thick enough to make the vada.Beat the batter very well till light and fluffy.Add salt,baking soda and beat well again chutney and red chutney and masala from above

Flatten the top of the ball with wet fingers and drop slowly into the hot oil.Deep fry on low heat till golden brown. Remove these deep-fried vadas into a bowl of water and let them soak for 15-20 minutes. Remove and gently press between your palms so that excess water oozes out. Keep them aside. Finish making vadas with the rest of the remaining better and put them in water like you did for the earlier batch.

Pass the yoghurt through a sieve to ensure that there are no lumps. Add in the sugar, salt and mix well..

To serve, place the vadas in a serving bowl and pour the curd mixture evenly all over the vadas and cover them completely. Sprinkle chat masala powder,red chilli powder

Also put a spoon of red and green chutney.