Take freshly grated coconut, raw walnuts, green chili, ginger, coriander leaves, curry leaves, tamarind, and salt in a mixer jar, grind to a fine paste using water.
Prepare the tempering by heating a little oil in a pan, add mustard seeds, split urad dal, hing, and curry leaves, wait for urad dal to brown a bit, and pour this tempering over the chutney and mix.
Serve with idli, Dosa, Adai, Upma or panniyarams.
Notes
Variation :
You may use any nuts in the place of walnuts like soaked almonds, peanuts or cashews work too.
I usually add curry leaves while grinding itself so that complete nutrition of curry leaves is intaken.
You can skip ginger.
You can try using red chilies instead of green chilies.
Add more green chilies for spicy chutney.
You may add a few mint (pudina) leaves too.
Note: Nutrition values are my best estimates. If you rely on them for your diet, use your preferred nutrition calculator.