Snake Guard with milk and Yogurt Curry

Take tender snake gourd, cut into small pieces. Take a pan, add oil,mustard seeds, cumin seeds, urad dal, 1 or 2 green chillies. Don't put more chillies as this curry tastes good when it is very mild. Now add hing, curry leaves, 1 small onion chopped, turmeric powder, now add half cup yogurt, mix well without lumps. Now add snake gourd pieces  mix well, now pour 1 cup of milk, salt and mix. Put lid and cook until the snake gourd is fully soft and all the milk and curd becomes like paneer and gets stuck to snake gourd pieces. Add more milk or water if required for boiling. Once everything comes together and not much water left, garnish with Coriander leaves and serve.