Now pressure cook the dal with turmeric powder, mango pieces (reserve three four pieces for later use) and 1 1/2 cup water upto 2 whistle.
Meanwhile, heat mustard oil in a small pan, temper the oil with dry red chillies, minced ginger and black mustard seeds, fry the reserved mango pieces till golden and soft.
Tok dal can be made with red lentils or masoor dal also.
Use a sour mango for the recipe.
Bengali bhaja masala - roast 1 tsp of cumin seeds, fennel seeds (saunf) and 1 dry red chilli. Grind it to a fine powder.