No heat up the grilled or tava apply oil on it and roast both the sides of slices on it.

Cut onion and tomatoes. Heat the oil in a pan and add onions. Fry till they become reddish brown. Now add all dry spices and mix well.

Now add tomatoes and mix it. Now add roasted bottle gourd, mix and cover it. Cook for five minutes. Serve hot with roti.