In a pan, add 1 cup rice flour, pinch of hing, 1 tsp cumin seeds, salt to taste, ¼ cup chopped green chilli, 1 tsp ginger paste and ¼ cup chopped coriander leaves.
Then add 1 cup curd and 1 cup water in it. Mix well and make a free flowing and lump free batter.
Now place pan on gas and start cooking the batter.
Stir continuously and Cook batter until it reaches the consistency of dough.
Take out dough in bowl and slightly cool down.
Apply some oil on your palms, take lemon sized dough and roll it. Flatten it softly and make a hole in its centre using your fingers.
Now heat oil in a pan, once oil is heated add vada for frying to it on medium flame.
Flip and fry vada from both sides until it becomes golden brown.
Drain out the fried vadas and fry rest of vada likewise.
Serve hot vada with chutney, tomato sauce and slices of onion.