In a cup add seedless tamarind. To this add hot water and soak it for up atleast 30 minutes.
Once the tamarind is soaked, using your hands squeeze the pulp, and check if there are any seeds of tamarind; if yes, take them out and discard them.
Now add the softened tamarind, along with soaked water in a blender jar. Blitz until pureed.
Place a fine mesh strainer over a bowl, and transfer the prepared tamarind pulp on to the strainer and strain it. Leave it aside.
Now in a heavy bottom pot, add oil. Once hot add cumin seeds, fennel seeds and asafetida.
Once the cumin seeds splutter, add the prepared tamarind pulp, along with 1 cup of water.
To this add jaggery powder, sugar, salt, black salt, cumin powder, Kashmiri red chili powder, garam masala and amchur (dry mango powder). 8. Mix everything well, and let the chutney simmer on a low flame.
The sugar naturally acts as a preservative for the chutney, and it keeps well in the refrigerator for weeks.
Simmer until the chutney thickens as per the consistency you like.