First soak chana dal and urad dal for 3 hours.
Grind red chilli and salt coarsely, before adding soaked dal.
Next add the soaked dal, completely drained from water. Grind coarsely. No excess water needed.
Transfer to a mixing bowl. Add chopped onion, carrot, curry leaves, asafoetida, cumin seeds. Mix well.
Water your hands, take small lemon sized balls. Flatten over your palm.
Heat oil in kadai until hot and drop the shaped vada in oil.
You can fry 4-5 at a time depending on the size and oil level.
Cook in medium flame until golden. Flip in between so that both sides are evenly golden and crisp.
Repeat to finish.Drain over paper towels.