Wash and peel the skin of Snake gourd. Chop finely and set aside. Wash and chop onion, tomato, garlic, ginger and set aside.
In a pressure cooker base, take the chopped snake gourd, onion, tomato, garlic, ginger, sambar powder, turmeric powder, coriander powder, salt and required water.
Pressure cook in high flame for 2 whistles. Switch off the flame and let the pressure release naturally. Open the cooker and drain the excess water. Reserve the water.
Mash the cooked snake gourd mixture coarsely. Add the drained water. Heat ghee in a mini kadai and splutter mustard seeds, urad dal, cumin seeds, red chilli, curry leaves and hing.
Add to the mashed snake gourd mixture. Check the consistency of kootu and boil if its too watery. Garnish with chopped coriander leaves.
Serve hot with plain rice adding ghee.
Enjoy !