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At first the pan was on a farly low heat,then after a while he put the lid on and it began boiling.As with my other take-away gravy the chef stressed that the onions MUST be cooked until they've virtually melted.When the gravy was ready he took an onion out,held it between his figures to illustrate the point,
This seems to be key to a good base and has been mentioned before. Can you approximate the time the onions were cooked for to reach this "melting point"? There seem to be wildly different interpretations among posters here of the "right" duration to cook onions in a base gravy, so it would be a useful reference point.