Wash and pressure cook Toor Dal till soft. I cooked for 3 whistles, and added the banana pieces and cooked for another whistle.
Once the pressure falls, add tamarind extract, chopped green chilies, hing, jaggery, salt, Udupi Sambar Podi, and enough water to get the required consistency. Finally, add the coriander leaves and bring to boil.
Meanwhile, in a smaller tempering pan, heat cooking oil, add the tempering ingredients and when done, pour on the simmering sambar.
Remove and serve with Steamed Rice.