Clean, wash and soak the arhar dal for 1 hour. In a pressure cooker, add the soaked dal.
Add the chopped onions, tomatoes, drumsticks, curry leaves, green chili, ginger, garlic, turmeric powder, water and salt to the soaked dal.
Pressure cook the dal for 3 to 4 whistles till the dal is cooked. Once all the pressure is released from the cooker naturally, open and now add crushed kasuri methi to the dal. Mix well and keep aside.
If the dal looks very thick, then you can add some hot water to the dal to get medium consistency.
making tempering for drumstick dal
In a pan, heat ghee. Add mustard seeds.
When they start to pop, add the cumin seeds, asafoetida, curry leaves. Fry for some seconds. Do not burn.
Pour the tadka immediately in the hot dal and cover the dal with a lid. This is so that the aroma and flavors from the tadka get infused in the dal.
After a minute or two, serve the delicious drumstick dal with either rice or chapatis.