I don't know if this has been documented anywhere but I pm'ed BB1 when his recipes were 1st posted and the takeaway he works in uses reclaimed bhaji oil

, in the base? in the dish??..I seldom see anyone with bhajis in glasgow, unless he meant pakora. "seasoned oil" is appearing in a few more vids these days i've noticed

I found using half of the 5kg batch left this underspiced for a finished sauce, still greasy. A chefs spoonful of this base does fry tomato paste/GG/methi really well, why wouldn't it?
The instruction was to stick with the oil, add no extra water. The amount of water evaporated or gained from the onions could obviously vary( i recently made 2kg onion CBM Little India base, using
150ml water initially & ended up with over 3ltr of base un doctored with water after blending, which i was surprised by)I think mine needed more water & less coconut(hardly any oil floating on top)
I ended up with the Glasgow base which was almost identical in taste & texture to the Ashoka version, minus some extra water for thinning it out. For anyone who has not made it, Ashoka is nowhere near a finished sauce, as it gets alot of its spice content from the onion paste. So a basic curry following the Glasgow recipe was way underspiced as there's a pretty standard amount in a 2.5kg base, with no more to be added at dish stage. I don't yet know what effect on taste will be by upscaling the spice in the 5kg version
Thats when i looked at a few other bases i had made to firstly try & find a balance with water & oil, hopefully to make this technique work, before the thread went all Asperger style again, sums included
To say this bir method whatever anyone thinks of it, is strange, unusual, wrong, is neither here nor there unless you have broad kitchen experience, have experience of varying bir business models(i have none of both so could never make a comment like that :

)Corner cutting/lazy/astute - possibly
If it didn't cook curries "properly" ...no one would buy it....if the Asian chefs don't care much for scientific knowledge of ingredients then i sure don't...i'm trying to copy them
I'll do a 5kg next time tinkering a little before making my mind up
@martinwhynot - posting the 25kg recipe would be great. It would let me see if less is more regarding spices as the base scales up
Regards
ELW