In a pressure cooker, cook the dal (lentils) with 1½ cups water, some salt and the turmeric powder, until completely cooked
Once the pressure cools off, whisk the dal until smooth
Heat a shallow cooking pot with the mustard oil until pale, then add the nigella seeds and the chilis
Fry these for a couple minutes and then add the whisked dal
Mix in well and then add ½ cup of water and some more salt, if needed
Let the dal come to a boil, add the coriander leaves and switch the flame off
Serve this simple and satisfying Bengali masoor dal (red lentils curry) with steaming hot rice. Enjoy!