In another post, i said this base has to be the best one i have come across so far, but i omit the chilli, reduce the curry powder and garam masala, and i fry the onion with the garlic etc, at the frying stage, principly to remove the raw taste of the onion that persists in all boiled onion bases i have tried.
However i have just found by trawling the net, that if you soak the onion in water for 15 mins then discard the water this is also suposed to remover the raw onion taste too. Another experiment coming up!
Steve