In a pan, add tamarind and water. Boil it to loosen the tamarind. After about 5 minutes, it will form a paste. You can take out any remaining fibers at this point by passing them through a sieve.
Now add sugar, salt, red chili powder, cumin, and ginger powder.
Mix everything and taste test.
Let it cool down completely and store it in an airtight container in the fridge for up to a month.
I didn’t strain the sauce until it was done cooking completely, and also had a lot of pulp at the end, which I repurposed for biryani or even snacking.