Take drumsticks and wash it twice in running water. Then chop them lengthwise. Pressure cook the toor dal in a small pressure cooker with hing and a cup of water for 3 whistles or until soft. Mash the cooked dal well with a laddle once pressure releases. Set aside. Peel the small onions and chop the tomatoes finely. Keep aside. Soak tamarind in warm water and extract the juice. Add 2 cups of water to the extracted tamarind. Keep it ready.

Heat a teaspoon of oil in a kadai and small onions.Saute them well for 5 minutes or until they turn brown. Add tomatoes, green chillies and fry them until soft and mushy.

Once the tomatoes are cooked well, add drumsticks and fry it for a minute. Then add sambar powder, turmeric powder and salt. Fry it for another minute. Then add tamarind water and mix it well. Bring it to a boil.