Add coconut, roasted gram, green chilli in your grinder and grind it by adding little water to make a coarse paste.
Transfer the content in a bowl, add salt to taste and keep it aside.
.Add sesame oil in a small frying pan and when its warm add mustard seeds, white lentil and asafoetida.
When mustard seeds crackle, add it to the coconut chutney, mix and serve.