I made a "full size" (i.e. 7kg) version of BB1's curry base, exactly as specified. I added 3 litres of water to the onions (which, as specified, half filled my stock pot).
It yielded about 11 litres of curry base.
I also made BB1's precooked chicken (but a one quarter sized portion and cooked for only 15 minutes rather than for the 1 hour specified)
I also made BB1's Chicken Curry (exactly as specified).
I took "1 heaped chef's spoon" to be equal to 60ml (as confirmed by BB1)
Here are the photos:
7kg of onions (unpeeled weight) plus spices and water:

After simmering the onions in water until soft and reduced:

After adding the oil:

After adding all the other ingredients and simmering for one and a half hours:

After blending:

After simmering again for 1 hour:

After standing:

Precooked chicken:

Cooking the chicken curry (single portion):

The finished chicken curry (plus about 60ml of excess oil that was removed):

The finished chicken curry:

Comments and observations:
- The final curry base was quite a bit darker than the photo seems to show. It smells and tastes quite pleasant (but not sufficiently flavoured, to my mind, to constitute a "curry sauce"). It is quite sweet. The coconut block isn't particularly discernable (flavour wise) apart from giving the base a degree of creaminess. The base is a bit greasy on the palate; probably due, in large part, to the large amount of oil present, and partly due to the creamed coconut block (I have found this before when adding quite a bit of coconut block to a curry base
- The precooked chicken had a nice flavour (quite smokey)
- The basic chicken curry was interesting. It released a fair amount of oil (much of which - about 60ml worth - I spooned off). But an amount of it came from the precooked chicken (and its sauce) that I added. The oil wasn't particularly flavoursome, nor did it have much of an aroma. The final dish was quite greasy on the pallate, but otherwise enjoyable. The texture was more "congealed" than I am used to (as can be seen from the photos)
The chicken curry was enjoyable. I will certainly use the remaining base up. But I doubt that I would make it again.
Perhaps it's just that I am not familiar with this type of curry (Punjabi? Pakistani?) cooking. But it's not particularly like that with which I am familiar (i.e. Bangladeshi/Bengali).
I have also never eaten a curry in Scotland.
OK, I won't add any more comments or observations, because I am sure I will be criticised and attacked for them.
A huge thanks for posting your recipes, BB1, they are an enjoyable change from the norm on the forum. And you seem to have made some of our Scottish friends very happy
