Heat the oil in pan, once hot add urad dal, fry it until the dal turns golden brown, then add coriander seeds, immediately transfer this to the mixer jar or onto a plate
Now keep the pan back on stove, to the same oil add cut bitter gourd, fry it until it becomes crisp and golden brown. Fry this on medium low heat
Once it cools down, grind this along with coconut, jaggery, chilli powder, fried coriander and urad dal along with tamarind and little water to a relatively coarse consistency,
This should be the consistency of the chutney. transfer it to a serving bowl.
Now for the seasoning heat the oil in a ladle on medium heat, once hot add mustard seeds, after it pops add urad dal, fry it until the dal turns golden brown, finally add red chillies , turn off the heat and add this seasoning to the chutney.
Eat this chutney with rotti, rice, dosa, chapathi...