Firstly wash dal and cook it in the pressure cooker adding little oil, turmeric and green chillies. The dal should not be mashy. Boil drumsticks until done and keep aside.
Add 1 tbsp oil in a pan, when it get hot add mustard seeds. When the mustard seeds crackle, add cumin seeds, curry leaves, pinch of hing, turmeric powder, red chilli powder, goda masala, and sliced tomatoes and sauté all the ingredients well.
Add in the dal and drumsticks and mix well. Add jaggery, salt and allow it to boil for some time. Add 1 tbsp fresh grated coconut, coriander leaves and ½ cup tamarind juice. Simmer the dal for about 2 to 3 minutes and bring it to boil until the raw flavour of tamarind juice is gone.
Finally when the frothiness is gone, switch off the flame and the toor dal amti is ready to serve.