I managed to quiz the chef about the puree he has stored in an ice cream tub. It starts out from a tin of White Tower as has been identified. But from that point, they do the following.:
Firstly, they add a good quantity of oil to a pan and fry off sliced garlic until starting to brown. They then add the tomato paste and and stir through the oil. It wasn't made clear how long for i'm afraid. Afterwhich they then add water to bulk it out and dilute the paste to a puree.
This will explain why I saw a deep rich red oil gathering on the sides and why the puree seemed more like a sauce. When lifted with a teaspoon you could clearly identify as a puree rather than a sauce as it had that typically grainy appearance within.
I am to return for more demo's and this will be part of the many questions I ask.
I am now aware that the tomato puree is another pre-processed part of many others that combine to make the BIR menu.
My conversations with the chef have been a real eye opener. It is clear to me, or at least in his kitchen, that each type of dish should appear to be different from another. He does not substitute quality for quantity or ease of application.
In the fridge sat many pre-processed parts. Pre-cooked Chicken, Potato, Mushrooms, etc. and a host of other components all treated in more than one way. Interestingly, most of the vegetables were pre-cooked using Panch Puran, particularly the potatoes.