In a pressure cooker, add dal, chopped mangoes, green chillies, turmeric, chilli powder, salt and water.
Cook for 3 whistles on medium flame.
When the pressure is released, open and mash dal and mango with ladle. If it’s too thick, add water to adjust the consistency.
In a tadka pan, add mustards and let it splutter. Then add all the other tempering ingredients.
When you get the aromatic smell, switch off the flame and add tadka to dal.
Mix and serve. Mango dal is best with steamed rice or chapati.