Cheers for sharing spadge, but i would not fancy your gas/electric bill lol
If it works for you then great!
I am not a regular poster on here but in my opinion by far the best method
for cooking a base gravy is by pressure cooker! you can leave the onions whole
or cut in half at best for a ultra fast and the sweetest of tastes which it needs to be.

Just found the forum a couple of hours ago and think its absolutely brill.
Been trying to make the perfect curry for a couple of years now,and whilst
I'm not the best cook in the world my efforts are not too bad these days!
Ive got a link to a blog for base sauce and restaurant Curry's which i
hope will be of some help.Sorry if its a repost.

http://cbm-mick.blogspot.com/