Peel the vegetables cut them into 4 pieces and remove all the hard seeds.
Heat oil in a saucepan, and fry cumin seeds till it slightly changes color. Then add chopped garlic and onion and fry till soft and translucent.
Then add chopped tomatoes, chopped tinda, red chili powder, turmeric powder, hing, and salt. Mix well, add a quarter cup of water, place the lid and cook for 5 minutes.
Now add coriander powder, cumin powder, lemon juice, and garam masala powder. Mix well and let it cook till the tinda is fully done.
Finally, add chopped coriander and remove from heat.
Serve hot with roti or hot phulka.