Soak the ambula in water for 1hr.
Then take the kadai and heat ghee in it. Then add red chilli and punch phuran in to it.
When it starts spluttering then add grated ginger. Then add soaked dry mango into it. After 2-3 minute add mustard paste into it. Then after 1-2 minute add jaggery and sugar into it. Then add some salt. And keep the flame in medium. Then leave it for 10 minutes. Then add grated coconut, red chilli and jeera powder into it and leave it for 2-3 mins. In between that add black salt into curd. And mix it well. Then add it with that dry mango mix. And switch off the flame. And mix all that properly. Now Dahi Ambula Khata is ready.