Prepare the Chilies: Wash, clean, wipe the chiles and then trim the stems and chop the green chilies into medium pieces.
Temper the Oil: Heat mustard oil in a pan until hot, then add mustard seeds, cumin seeds, fennel seeds, kalonji and a pinch of asafetida. Let them splutter and release their aroma.
Roast the Besan: Add the chickpea flour (besan) to the pan and stir continuously on medium flame. Roast until it turns golden brown and emits a nutty aroma.
Add Chilies and Spices: Add the chopped chilies to the pan, followed by turmeric, red chili powder, coriander powder, cumin powder, amchoor powder, and salt. Mix everything well.
Steam Cook: Sprinkle a few tablespoons of water with your hand over the chili-besan mixture. Cover the pan and let it cook on medium flame for about 5-6 minutes until the chilies are tender and coated with the masala.
Finish and Serve: Optionally, add a small pinch of sugar, mix well, and serve warm with parathas.