by Workingman » 18 Jan 2015, 13:46
I found it!.
The French have a sweet onion they use for making onion soup, but shallots should also work. The secret is to take your time. Use the smallest ring and don't let the heat get above medium.
2 large sweet onions, or in Ally's case a similar amount of shallots, sliced into half rings.
A good sized knob of butter, enough to coat the shallots as they cook
1 tsp salt, but not all at once, could depend on the butter
Black pepper, to taste
2 Tbs brown sugar
Good glug of balsamic vinegar or, at a push, red wine vinegar.
Slowly, slowly slowly.... On a low heat, heat butter till it melts, then saute the onions till soft and translucent - about 15 mins. Turn up the heat a bit and stir until the onions start brown at the edges. Add the salt, pepper and sugar and continue to stir till the sugar has melted and the onions are caramelised, Add the balsamic and turn the heat to a low simmer. Keep stirring till the relish thickens. The one tip was not to go by the thickness of the relish in the pan. Keep taking a small sample on a spoon and drop it on a cold plate to see if it sets - a bit like testing jam. Once it at the consistency you like it is done.
Jar up and eat with cheese, hot-dogs, burgers or cold meats.