Hi jocko
One of my local T/A has a slight after taste of aniseed, Which I would put down to Star Anise,(could even be fennel) But don't know if it's in the base or the final dish, Would be interesting to find out though.
I quite often come across the odd segment of star anise from some of the restaurants I frequent, and like any whole spices I find in BIR dishes, it usually bears the signs of being well used (i.e. having been through extended cooking).
If they use it in the base it will usually form part of an akhni stock along with other whole spices (cassia bark, cardamoms, Asian bay, etc), which is strained and the whole spices saved for the next stock (as was reported by the Fleet 5 on their visit to the Zaal, under the tutelage of chef Az).
It's more likely that it finds its way into the final dish accidentally via the pre-cooked meat stock, which often includes whole spices. (I know this happens when I cook at home, and all to the good.)
But next time you go in why not ask them? I've found most restaurant / TA owners more than happy to chat about their dishes, and if it's not too busy some will even usher you behind the TA counter into the kitchen for a shufty.
Worth a try, anyway...