Quote from: JerryM on October 03, 2009, 08:49 AM
i use tamerind quite a lot (only in tikka marinade). i can't see it working well in mint sauce - it's like jet black in colour.
That's the tamarind paste Jerry. If you buy tamarind pods, soak them in hot water and squeeze the result through a sieve, you get a brown thin paste. I imagine if this was to be added to yoghurt it would turn yellow. I tend to agree though that adding a souring agent to already sour yoghurt seems unlikely.
Quoteone TA i know does "yellow" mint sauce but even this tastes the same as the green. i've never come across white. even the yellow i would say is just down to say a little turmeric
Yellow is the most common one I have seen. Never seen plain white raita and green only a few times and is clearly made by the addition of food colouring. The yellow could, as you say, be due to the addition of turmeric, but I know for sure that some use mango pulp (you buy it in cans) which sweetens it and makes it yellow.
The addition of spice of any sort seems wrong to me as there clearly isn't any in the ones I get, but that's undoubtedly a regional thing.