Rinse chilka moong dal a couple of times in water. Soak the lentils in 6 cups of water for 4 to 5 hours.
After soaking, rub the dal between your fingers, so the skin will come off. Keep rubbing and massaging till 80% of the skin comes off.
Now drain the water and the skin will float on top, remove that too. Drain the soaked lentils very well. There should be no water in the soaked dal.
Add the soaked lentils, green chilies, and ginger to a food processor. Grind to a coarse mixture, without water. Add only if not able to grind at all.
Transfer the batter to a bowl and add salt. Mix and stir vigorously with your clean hand for about 3 to 4 minutes. It will make the batter light, airy and fluffy.