Eggplant Bartha (Akbar's)

I scored this recipe at Akbar's a few weeks ago but have not tried it yet.

Ingredients:
1 large purple eggplant
ginger
garlic
Onions
Tomatoes, chopped fine
Salt
Red chilis
Coriander
Cumin

Instructions:
Bake the eggplant in the oven at 360 degrees F for 30 minutes until it is soggy and shriveled.
Peel and mash the eggplant.
Chop onions very fine.
Heat oil in pan, and saute onions until soft.
Grate in ginger and garlic and saute another minute.
Add the eggplant, tomatoes and spices.
Cook for another 5 minutes.