Soak green gram for 30 minutes
Grind coconut and green chillies into a fine paste
Cook soaked green gram with water, salt, and turmeric powder until tender
Add chopped onion and tomato to the cooked green gram
Add the coconut-chilli paste to the curry and mix well
Add curry leaves and simmer for a few minutes
Heat coconut oil in a pan and add mustard seeds
When mustard seeds crackle, add curry leaves
Pour the tempering over the curry and mix well
Serve hot
