Soak the dal for about 5 hours.
Drain and grind it into a smooth thick batter using minimum water.
Add salt and coriander leaves to the batter.
Drop small balls of it in hot oil and deep fry them in batches.
Drain on an absorbent paper.
When these are getting fried, make a semi thick consistency yoghurt mix with salt and some coriander leaves
You can add little water to the yoghurt if it is too thick and beat well. Don't add much.
As soon as the excess oil gets absorbed, transfer these pakoras into the yoghurt mix.
See to it that all of them are soaked properly in it.
Temper them with the cumin, curry leaves, chopped green chillies and dry red chillies.
Do not soak these vadas in water before adding to the yoghurt mix. I suggest you all not to do that. These vadas are cotton soft on their own as these are made from dhuli urad dal. Enjoy these melt in mouth dahi badey recipe from Hyderabad, iam sure you all will love it.