Heat oil in a vessel. Add the crushed garlic and curry leaves and toss them for 8-10 seconds.
Add the onions and fry till translucent. Add the chilli pwd, turmeric pwd and salt. Combine well.
Add the chopped tomatoes and cook on medium heat uncovered for 4-5 mts. Reduce heat, add the roasted drumsticks and cook covered for another 5 mts.
Add a glass of water, jaggery, adjust salt and cook covered till you get the desired gravy consistency.
Garnish with fresh coriander leaves and serve with hot chapatis or rice.