Cut the brinjals into four vertical pieces along with their stems. Heat oil in a non-stick pan.
Roughly chop onions and add to pan. Sauté till soft.
Combine mustard seeds, methi dana, fennel seeds, cumin seeds and onion seeds in a grinder jar. Grind coarsely.
Add brinjal pieces to pan and toss to mix. Add salt and turmeric powder. Mix well.
Add a little water, cover and cook till brinjals are soft.Add a little more water and mix well.
Cover again and cook for 2-3 minutes. Add red chilli powder and mix well.
Add coriander powder and the ground powder. Mix well and add a little water. Mix again.
Add a little more water and mix again. Add amchur and mix well.
Cover and cook for 2-3 minutes more. Serve hot.