1. Wash and pressure cook the toor dal along with asafetida, turmeric powder.
2. Heat oil in a pan, season with methi seeds, mustard, cumin, red chilly and curry leaves.
3. Wait to crackle.
4. Add chopped onion and sauté till it turns light pink.
5. Add chopped tomatoes, stir until it is cooked.
6. Now add turmeric powder, red chilly powder, coriander powder and salt.
7. Stir well add Murungai (drumstick leaves).
8. Saute in low flame. Add sambar powder, salt, water and allow to cook covered for 5 mins.
9. Now add the mashed dal, tamarind juice,
10. Stir well and allow to boil for 2 to 3 mins.
11. Serve hot with white steamed rice.

Recipe courtesy: Tasty Appetite

Note:The leaves are packed with essential vitamins and minerals esp. Vit A & C. It prevents malnutrition and related diseases.