Turning a block of taramind pods into a puree ready for use is as simply adding water.
I use 1/2 a block at a time
Put the half block of tamarind in bowl and cover with boiling water from the jug. Probably a cup. Let it soften for a few minutes and then break and mix up with a fork.
Once it becomes loose strain it through a sieve, push it through with a back of a spoon.