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