Wash the ridge gourd. Remove the rough threads from the skin.
Then, peel out the skin. Keep it aside.
Heat oil in a pan. Add chana dal, urad dal, dry red chillies, cumin seeds and garlic. Fry them on low to medium heat until the lentils and garlic change colour.
Add ridge gourd peels.
Add salt and turmeric powder. Lower the heat, cover and cook for 2-3 minutes.
Transfer this mixture to a mixie jar. Add tamarind and roasted sesame seeds powder.
Grind it to a paste. Add just enough water to aid grinding. Transfer to a serving bowl.
Fro the tempering, heat oil in a pan. On medium heat, fry urad dal, asafoetida, dry red chillies and curry leaves.
When the lentils turn golden brown, put this on the prepared chutney. Serve the chutney with hot steamed rice and ghee.