Soak dal in water for 2hr to drain
Chop chillies, shallots, ginger and curry leaves
Grind dal to a coarse paste without add water ( not grind it to smooth paste)
Add chopped ingredients into it
Add salt and mix well
Wet your hand and make equal size balls with the mixture
Make balls as round shape by press it
Pour enough oil into a deep bottom pan and heat it
When the oil is hot reduce flame to medium
Deep fry the vadas by turning both sides till golden brown color
Serve it