Brush the egg plant with oil . Preheat the oven to 500F or the max in your oven .Bake the eggplant for 10 minutes .
Remove from the Oven.It will be like this .
Start removing the skin of the eggplant .
Take the flesh and mash it like this .Set Aside
Heat oil in a Kadai . Add the cumin Seeds and allow it to crackle .
Add the ginger garlic paste and fry for few seconds .
Add the onions , tomatoes , green Chilli , Garam masala , red chilli powder , coriander powder , turmeric powder , salt and cook till the contents become soft .
Now add the mashed eggplant and cook till the oil separates out from the masala .
Serve hot with Roti