Dry roast jeera till nice aroma comes, then grind it to a fine powder, set aside.
Soak dates and tamarind in water till immersing water for 30mins.Remove the fiber part in tamarind and then soak.
Remove seeds and fiber from tamarind.
Remove seeds from dates if you are using dates with seeds.
Pressure cook dates and tamarind with very little water say 1/3 cup for 3 whistles.
Cool down and then grind it to a smooth paste.
Transfer this mixture to a pan and heat it up.
Add jaggery and red chilli powder.Simmer and let it boil for 5mins.
Once it becomes saucy add roasted jeera powder and give another boil till the chutney becomes thick like sauce consistency.
Switch off and store it in clean container, refrigerate until use.
Serve Tamarind Chutney with any chaat!