Heat oil in a pan. Add the cumin seeds, nigella seeds, carom seeds, bay leaf, and dry red chilies.Saute and let them crackle.
Add the minced garlic and saute. Let the garlic cook until the aroma of the garlic disappears.
Next, add in the onions and saute.
Add the potatoes and mix well. Keep stirring and sauteing the potatoes. Let them cook for 4-5 minutes.
Next, add the powdered spices along with salt.
Add in the eggplant next and mix well. Saute and let the mixture cook for 3-4 minutes.
Add the tomatoes next and mix well. Cover the mixture and let it cook for 5-6 minutes.
Add water (optional) next and mix.
Once the curry is done, add slit green chillies and mix.
Garnish with coriander leaves and serve hot.