Over low-medium heat, roast each of the lentils separately in a few drops of oil until the lentils turn light brown and become fragrant.
Roast sesame seeds without oil until slightly browned.
Add long red chillies and curry leaves in what oil remains in the pan until the chillies are browned and curry leaves dark green and crisp.
Add salt and asafoetida on the warm ingredients. Let everything cool completely.
Grind all the ingredients in pulses until slightly coarse.
Spread out in a plate to dry and cool. Store in an air-tight container for a month.