Heat 1 tsp of oil in a kadai. Add in onions and bitter gourd and saute for 5 mins or so till it turn translucent.

Now take toor dal in a pressure cooker and add the sauted veggies in it. Cover with water and pressure cook it for 3 whistle. Simmer the cooker for 5 mins. Turn off the heat and let the steam go all by itself. Open the pressure cooker and mash the veggies and dal slightly.

Transfer this entire mixture into a kadai. Add in salt, tamarind pulp, jaggery, chilli pdr, coriander pdr, turmeric pdr and mix well.

Bring everything to a boil. Simmer the flame and let it cook for 15 mins.

Now make the seasoning. Heat oil and crackle mustard, urad dal, curry leaves and coconut. Fry it till golden.

Pour this over the curry and mix well.

Serve this with rice.