Discard the stems. The measurement given after discarding, so that's 100 grams of just the leaves without the stems. And that's my dear mom patiently at it. Yay for moms :)
Wash it well. The best way is to fill a basin/or a big bowl with water and wash it well. The dirt gets settled down at the bottom this way. Set aside.
Take a pan and heat in medium-low flame. Add the oil and roast the asafoetida, red chillies, urad dal, peppercorns and salt until aromatic,
Add the tamarind and saute for another 30 seconds.
Next goes in the leaves and
saute it for another few seconds until it wilts down a bit. Don't overcook it.
Cool it a bit and add this to your food processor.
Grind it until coarse.