Wash and soak 1 cup moong dal for 4-5 hours.
Then remove soaked dal water with a strainer.
Now add dal into a mixer jar with green chilli, ginger and garlic. Grind into a coarse paste without adding water to the batter.
Take out grinded mixer into a bowl and stir continuously in one direction. After a few minutes mixer is light, and fluffy and changes its colour.
Then add crushed coriander seeds, crushed black pepper, fennel seeds, ajwain, salt, chopped onion, green chilli and coriander leaves. Mix well.
Now heat oil in a pan and add vada into it. Fry vada on medium flame till it becomes crispy and golden brown.
Serve hot dal vada with chutney, fried chillies and onion slices.