Hi Muttley!
This sounds good
I really believe that the key to a good sauce is the initial garlic ginger fry (as you said) and the L O N G boil
Well, when I "reverse engineered" the sauce from what I believed the IR's must do, I actually changed the garlic/ginger frying to what
you suggested. I would have done it for a couple of minutes until just coloured, but what you said about frying it slowly until it browned, seemed, intuitively right, somehow, so that's what I did.
The other thing I'm still not sure about is whether it would be better to fry the onions first. And if so, for how long.
There are so many permutations and combinations.
The trouble is, that you actually get quite a lot of sauce for each batch you try.
Having mused on this even further, I'm pretty sure that the basic sauce should not contain tomato. I don't think that long cooking of the tomato actually adds anything, and it makes the basic sauce less versatile (cannot really be used with anything that shouldn't end up red-orange in colour.
I think now that I've got something that is as near as damn it spot on, I can use physics to try and simplify/speed up production.
What I'd like to be able to achieve is a technique that anyone can try - one that will not look intimidating and overly time consuming or complicated to those trying to take their frst steps in home cooked curry.
One possibility that I think may well be beneficial is microwaving the onions first. Microwaves are not, generally, that useful in cooking, but one thing they can do is break down the cellular structure of high water content ingredients placed in them. I think this and frying the onions might speed up the process a little.
I doubt, though, that it will ever become a 20min operation (or indeed, a 2 hour one).