Wash the coriander, mint, raw mango, green chillies and ginger very nicely in normal tap water so that all the dirt is removed.
Drain the water using a colander. Let it sit in the colander for 5-10 minutes so that all the water is removed.
Roughly chop the raw mango, green chillies and ginger to 1/2 an inch pieces. This helps in even grinding of the chutney
Add half of the coriander, mint and raw mango
Add the green chillies, ginger, cumin seeds, cumin powder, salt, asafoetida.
Now add the remaining coriander , mint and raw mango
Layering this in the way mentioned in the above 3 steps helps the chutney to grind very finely.
Grind it to a smooth paste. Add water only if required.
When serving add a dash of lemon juice to it.
If adding raw mango, lemon juice is not required.