Saute Onions And Tomatoes For 2-3 Minutes
In the meanwhile, pour refined oil in a deep-bottomed pan, keeping it on medium flame. Add cumin seeds and green cardamom in it and saute for about 2 minutes. Once done, immediately add the sliced onion and fry for 2-3 minutes straight. Make sure you don't burn it, so when the onion starts to get brown in colour, add tomatoes and tomato puree and fry for another 5 minutes.