Soak de-skinned field beans in water for 3~4hrs
De-skin the field beans, such that the inner cotyledons are separated
Peel and grill 1 onion, similar to grilling eggplant for baingan ka bhartha
Heat 1tbsp of oil, add coriander seeds, dry red chili, chana dhal, urad dhal, cumin, fenugreek, black pepper and fry them well
Allow it to cool down
Grind into a fine paste along with asafoetida, burnt onion, raw onion, coconut, tamarind extract
Meanwhile add peanuts in the same pan and fry it well and add enough water and cook till tender
Add field beans and cook till tender, add little water if required
Add salt, mix well and cook for 5min
Add the ground masala, mix well
Add little water and cook for 5minutes in low flame
Heat rest of oil, temper mustard and curry leaves and season
Serve hot with naan or chappathi