Take tamarind in the bowl and add boiled water in it.
Soak it for 15 to 20 minutes.
Now mash the tamarind with finger tips to take maximum pulp out of it. Don't worry, temperature of water must have come down by now. If water is still extremely hot, use some spoon or spatula.
Take a bowl and place a sieve over it.
Transfer the mashed mixture into the seive & saute it so that all the tamarind water drains into the bowl. Discard the remains left in sieve.
Take a pan and transfer the tamarind water into it.
Add all the ingredients mentioned in the ingredients list except raisins.
Cook for 5 minutes on medium heat. But keep stirring at intervals.
Add raisins and cook for another 10 minutes on the same heat with intermittent stirring.
Switch off the heat and let the mixture cool down completely.
Tamarind chutney is ready.