Wash and peel bottle gourd and cut in small pieces. Set aside. Likewise cut onion and tomato into small pieces and set aside.
Take a pan and add oil. To the oil , add the black gram and cumin seeds. Fry for 1 min.
Add onion and fry until golden brown.
Add the cut pieces of bottle gourd and fry for 3 min. Add water and cover with lid. Cook until done.
Add the tomato and cover with lid to cook until done.
Add Salt, turmeric and chilli powder . Mix well.
Grind grated coconut into paste and add this to the bottle gourd. Mix well and cook for 5 min.
Serve hot with rice or roti.