Heat oil in a pot and some mustard, cumin and let it splutter
and dd green chili and fry for 2 to 5 seconds
Add curry leaves and fry for few minutes
Add chopped onions and cook for a few minutes till its golden
Add ginger-garlic paste and saute it for few minutes
Now, add the chopped tomatoes and cook till its soft and mushy
Add red chili, turmeric, and salt (as per taste) and stir well
Cook till the oil gets separated from the masala
Now add the vertically cut brinjal and saute them in the masala for few minutes
Add half a cup of water and mix well
Bring it to boil and gravy consistency and add chopped coriander leaves
Turn off the heat and serve hot