Ingredients :

1/2 cup Urad Daal
1/2 cup Moong Daal
1 Onion finely chopped
1 tsp Ginger
1-2 Green Chilies finely chopped 
Salt to taste 
1/4 tsp Baking Soda

How to make the scrummy yummy Vada : 

Pick, wash and soak daals for 3-4 hours. 
Grind them coarsely in a blender. 
Now add onions,ginger, green chilies salt and baking powder and mix well and set aside for 5 minutes.
Heat oil in a pan or kadhai and deep fry a spoonful of batter till golden 
Serve with chutney or sambhar or rasam as a breakfast