Cherupayar vada

Ingredients:- Cherupayar/ Green gram – 1 cup Salt – 1.25 tsp. Spring onion – 1.75 cup; chopped Greenchilly – 5 to 6 numbers; very finely chopped Curry leaves – 3 sprigs;finely chopped Ginger – 1 tsp. ; chopped Baking powder – 1/2 tsp. Roasted and crushed cumin seeds – 1 tsp. Roasted and crushed coriander