I tried this today. I cheated and cooked the garlic/onion mixture in the Thermochef, and it did burn a little, but luckily I caught it in time.
I added about 100ml of base sauce to it, and apart form being just a little too salty (I will adjust it next time) it was very, VERY nice indeed!!

I also cooked a Korma and Madras.
Definitely the best of the 3 curries tonight. Thanks for posting mate.