Heat mustard oil in a pan
Add cinnamon, cumin seeds, green cardamoms, kashmiri red chilies, asafoetida powder, turmeric powder, coriander powder, salt, mix them well together and add little water
Add dry ginger powder and mix them together
Add sliced onion and eggplants
Fry them well together
Cover them and let the eggplant cook for 15~20 min
Add the sliced tomatoes, fennel seeds and little water
Let the tomatoes cook for 5min
Garnish some coriander leaves
Squeeze lemon juice
Serve hot with rotti