Stephen, vinnyderloo,
many thanks for link to masala mark. i'd forgotten about those posts. much appreciate the prompt - i now think i can get some mileage from it.
just to be clear NO DOUBT at all there are 2 methods of cooking in BIR. the main one (say no1) we are all aware of and which is what i've learnt and spent all my time on.
this 2nd method took me by surprise (it should not have done re Ashoka method which seems a sort of cross between the 2 or maybe is the 2 nd method) - a very simple base to which pastes/sauces/2nd base (call whatever it is = sauce) are added to make each dish. there are say 5 types of these sauces and they are either used individually or combined to produce the menu. the manager says they are purely used (as opposed to method 1) to produce the dishes quickly to meet service. i get the impression the sauce is made in real bulk - pure guess say 5L at a time.
i'm currently trying to think how you would cook with method 2. these being on my mind:
1) would you still add oil then garlic ginger - or would the garlic ginger be in the sauce
2) would you still add the puree and spice and fry - or would this too be in the sauce
i suspect they simply add oil, then sauce, then base - in short they cooked down the sauce like you would normally cook down the garlic, puree, spice.
what's my interest - i sort of think if it's done for ease in BIR it may make home BIR easier too. the effort to make at home currently being my no1 difficulty.
will have read up on both masala mark and ashoka - which am sure will give the pointers i need.