In a blender, add Grated coconut, green chillies, roasted gram dal and salt.
You can little water while grinding. Blend it into a thick paste.
Transfer it into a serving bowl. If you grind thick, then it is Getti Chutney which is usually served in restaurants.
You can adjust the consistency of chutney by adding water. Make sure you just the consistency before tempering.
Now heat a small pan or tadka pan for tempering.
Add oil. Once hot add mustard seeds.
Wait till mustard seeds crackle.
Now add urad dal and gram dal. Let the dals turn golden.
Now add Curry leaves. Wait till curry leaves become crisp.
Switch off the flame.
Now pour this tempering over chutney.
Serve with Idly or Dosa