Heat the oil in a saucepan. Splutter the cumin seeds.
Fry the onion till wilted. Add the ginger and saute till raw smell is gone.
Add in the powders and salt and saute for a minute. Add the pureed tomato and bring to a boil.
Add the drumsticks, sprinkle in a little water, and cook till the curry is dried and the drumsticks are cooked. Stir occassionally.
Garnish with coriander leaves and serve hot as side for rice and curry or along with chapathis.