Soak the lentil for 2 to 3 hours.i always recommend soaking bcuz it save fuel

Now in a pressure cooker have 3 whistles

Now for tadka,roast cumin seeds,red hot pepper and black mustard seeds together

Add chopped onion and green chilli

Make them brown and add tomatoes with all the spices

Let stir until it spreads oil all around

Add it to boiled dal and boil ready dal for 10 minutes to mix tadka properly

Dal is ready garnish with coriander leaves or kasoori methi