Grind the Pudina, coriander, green chillies along with a pinch of salt to a smooth paste. Add the tofu pieces to this Pudina paste in a bowl and mix well. Keep it aside for about xbd an hour for marination. In a wok heat oil, add the cumene seeds and then the chopped onion. Fry till the onion turns translucent and add the marinated tofu pieces and mix nicely. Adjust the salt if required and turn off the gas stove, donu2019t cook for more than a minute.Just before serving sprinkle some chaat Masala and lime juice. Serve with Roti or this stir fry can be eaten as it is as a light lunch!