In a pressure cooker, heat oil and add the cumin seeds. Once they splutter add the finely chopped ginger garlic and green chilles.
Keep stirring for a couple of seconds (ensure not to burn them) and then add the onions.
Saute till onions turn light brown. Now add the salt, pepper and turmeric powder.
Mix and saute for another 1-2 mins. Then add the tomato puree, mix and cook till the water from tomatoes evaporate.
Now add the red chilli powder & coriander powder. Mix and let it cook for another 1-2 mins till the masala starting leaving oil from the sides. Make sure to keep stirring intermittently.
Now add the Tinday and give it a good mix.
Add around 1 to 1.5 cups of water, mix, close the lid and allow 2-3 whistles of the pressure cooker.
Switch off the gas and allow the steam to escape completely.
Then open the lid and add water if required depending on how liquidy you want your gravy to be(I added more 2 cups)
Mix well and get it to a boil. Finally add the garam masala, lemon juice and coriander leaves. Mix well, simmer for 2 mins and serve.