Heat oil in a wide pan and crackle mustard seeds and add asafoetida, red chilli and curry leaves.
fruther add chopped mango pieces, salt and fry for a minute.
mix in turmeric powder and chilli powder until well combined.
sprinkle water for the mangoes to get cooked.
close and cook until mangoes are sfot.
open and mix once, add jaggery. let it melt.
when the jaggery melts, mix and let it shrink until it gets to a jam-like consistency. Do not over mix to mash them.