Take all the measured dal and rice wash it and soak with red chillies for 2-3 hours.2.After soaking drain the paruppu and rice mixture well.3.Put this in a mixer jar with needed salt and hing.4.Grind it little coarsely without adding water.5.Bring to a consistency as shown.Let it marinate for an hour.6.Now keep a pan with a tsp of oil add mustard to splutter.7.Add some curry leaves then grated coconut switch off.8.Mix this with the batter.9.You must now add little water to bring to dropping consistency as shown.10.Heat oil in a kadai when it is hot pinch off batter flatten a little and drop in.11.cook at medium flame till its well cooked and golden take out in a tissue.
Notes
The shape of this vadai may not be perfect its crunchy outside and soft inside.
Always cook in medium flame so that it is cooked from inside.
Some time they add onions and many add sabudana in this thavala vadai.