- First grind coconut, fennel seeds, onion and water 
- heat oil and splutter mustard seeds 
- Add Curry leaves, onion and saute for a minute 
- Furthermore Add tomato, salt and turmeric powder; saute for a minute 
- add brinjal, drumstick and potato; saute for 2 minutes 
- Add sambar powder; saute for a minute 
- Add water; cover and cook till veggies gets cooked 
- Add ground mixture, coriander leaves and little water; bring to boil