Heat oil in a vessel, add cumin seeds, black gram, Bengal gram, red chillies and sauté for 2 mins. Add green chillies, garlic and ivy gourd pieces and sauté for 10 mins till the pieces are half cooked. Turn off heat and allow to cool.
Grind all the ingredients to coarse paste, adding tamarind, salt and jaggery. Add little water if required. Transfer to a serving bowl.
In a small pan, add a tsp of oil and once hot, add mustard seeds.
Once the seeds splutter, add red chilli, curry leaves and asafetida and sauté for few seconds. Pour over the chutney.
Serve with hot steamed rice and a dollop of ghee.