Hi Everyone
AFAIK, the vinegar based mint sauce is the type of mint sauce that is generally used. It is the type I use myself and also the type that was used by Az in the Zaal restaurant cooking lessons.
Disclaimer: I am not saying that all chefs, establishments, recipes etc. will require this. But if its used by Az in his Tikka and I have used it to great success the countless times I have made Blades Tikka - then it can't be far wrong, if indeed it is wrong. There, that should hopefully cover it


Cheers