Apply oil on bottle gourd, onion and tometos. Roast it on flame. Remove peels from them and fine chop it. (If you get hard to remove peel from bottle gourd wash it..it's easy to remove peel.)

Make paste from ginger, garlic and green chillie.

Heat oil in wok. Add cumin seeds and ginger, garlic and green chilli paste. Saute it.

Now add add onion and tometos turn by turn and saute it. Now add chopped bottle gourd.

Add all spices and mix well. Let it cook for 2 to 3 minutes on low to medium flame.