Place the chopped cabbage and onion in a mixing bowl
Add all the spices - Chili powder, Coriander powder, Cumin seeds, Salt, and Asfoetida . Mix well and place it aside for 5-10 minutes
Meanwhile, place a deep fry pan over a medium heat and required amount of frying oil (2-3 inch deep).
Take small chunks of batter and shape them into 20-25 balls (About 1"-2")
Gently flatten the balls to make sure they cook evenly.
Make sure the oil is ready for frying by dropping a small piece of batter in oil. It the piece touches the bottom of pan and comes up instantly, the oil is ready.
Drop the flattened batter in batches of 5-10 depending on the size of your frying pan.
Fry them until they turn golden brown on both sides.
Place the vada on a paper towel to allow extra oil to drip and let it cool a little.