This is something my grandma and my MIL prepares. I have not tried this yet. So this recipe is from my MIL. Here is the recipe.
Channa dhall - 1 cup
coconut - 2 tbsp
Red chillies - 3 (acc to taste)
Mustard seeds- 1/2 tsp
Urad dhall - 1/4 tsp
Oil - 1 tsp
First fry channa dhall in a dry pan till it becomes pinkish in color. Let it cool and soak it in water. Let it soak for half an hour. Pre heat remaining oil in a pan, splutter mustard seeds, fry urad dhall, red chillies and coconut till it becomes golden brown. Let it cool. After half an hour, drain it and grind everything nicely. Add water to adjust the chutney consistency. This is again a side dish for idly and dosa.