Dry roast all ingredients starting from coriander seed to black pepper in the above List (total is 7). Cool them and make a powder of it.
In a pan heat 2 tsp oil ,add hing and mustard seed .Let it sputter .Add fresh curry leaves and chopped onion. Fry for a minute at medium flame.
Dissolve tamarind pulp in 3 cup water ,add salt and add this to pan.Once it reach boiling point ,add drumstick pieces.Let it cook for 10 minute until they are just done.Don’t overcook it.
Add 3 tbsp of fresh blend spice powder ,salt ,jaggery and cook for another 5 minute.
I prefer a thick coated gravy ,you may keep it according to your choice.Serve Hot.