firstly, in a large bowl soak 1 cup moong dal for 4 hours.
drain off the water and blend to smooth paste adding ¼ cup water.
transfer the prepared moong dal batter into bowl.
add in 3 tbsp rice flour for crispy vada. add more rice flour if required to get thick batter.
also add 2 green chilli, 1 inch ginger, 2 tbsp onion, 2 tbsp coriander, 1 tsp jeera and ½ tsp salt. mix well.
further add ¼ tsp baking soda and give a good mix.
now dip your hand in water, and start dropping them one by one to hot oil.
keep the flame in lower to medium stir occasionally.
also fry the vada till they turn golden brown.
drain off the vada on to kitchen towel to absorb oil.
finally, serve moong dal vada with coconut chutney or tomato sauce.