First make the paste. Put all of the ingredients for the paste into a blender. Add 50 ml water then blitz to a paste.
Place a heavy based saucepan over a medium heat and add the oil. When hot, add the asafoetida and cumin seeds and let them sizzle for a few seconds to infuse the oil.
Add the paste and fry for 2-3 minutes, stirring, to make sure it doesn’t stick to the base of the pan. Add the chilli powder and fry for another minute, then add the green peas and mix well for a minute more.
Add 250 ml water, the jaggery and salt, mixing well, to form a thick gravy.
Bring to a boil, cover and simmer for 5-7 minutes then remove from the heat and garnish with the coriander. Serve warm with some chappatis.