Why do TA's pre-cook chicken then add it to sauce? Why add a sauce? why not just the chicken?
I know WHY do you?
Is it to add flavor to a curry???
Now the big GUNs on here should be able to answer this?
I'm not a big gun or anything, but I've been at this lark since 1981 and I always thought that the reasons BIRs precooked their chicken/lamb/mutton in what is, essentially, a thin curry stock containing whole spices, were:
1. To facilitate speed of service
2. To ensure that the meat is tender
3. To ensure that the meat's natural water content doesn't dilute the sauce and compromise its intensity.
4. To ensure that the meat has flavour that not only complements the sauce, but adds to it. (Should some of the stock also make it into the curry pan, along with the odd whole cardamom or petal of star anise, etc., all to the good.)
As to why they would not just serve the meat without the sauce, I don't fully understand the thinking behind this, Chris, as surely the whole raison d'etre - the one central element around which the BIR concept pivots - is the curry sauce.
Without the curry sauce you do not have BIR. You don't actually need to add meat to it to create a BIR curry (in fact, I quite often knock up a batch of Chewy's Madras sauce after the pub to dip a chapati into when I'm out of precooked meat).
I may have misunderstood you though.
Anyway, that's my stab at it!