OK panpot, here's my thoughts on why it wasn't coconut block:
1. Coconut cream takes ages to dissolve (well the stuff I use does anyway!), especially in 1" chunks.
2. With that much coconut cream used there has to be a coconut flavour in the end result. If not why would they use it? It would be money down the drain, and the BIR business is very competitive as you know. This is the best argument against it being coconut cream in my opinion.
3. No BIRs that I have seen have used coconut block in the curries. Admittedly I haven't seen that many BIRs, so that's a weaker argument.
4. Compared to coconut flour (which I know is used in BIRs), coconut block is expensive.
Having said that, I am stumped as to what it might actually be if not coconut cream! A type of sugar perhaps? But probably not in the quantities they have used. Anyone take a guess? What's white, comes in 1" cubes, looks like coconut cream, and dissolves easily in a curry?
What do you also make of the Ghee and Sauce for frying in and the use of the red paste? In addition the onions which were a just below me in the corner of the counter were chopped about half an inch square but cooked in an oily almost curry like looking sauce?
Well, at a guess, Bhuna is a rich dish so I would expect the use of ghee. The red paste I would suggest is tandoori masala, the same as used in CTM. The onions sound like they have been precooked in turmeric, a common technique used in BIRs.