Ingredients
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3 tablespoons olive oil
3 kg brown onions, sliced
250 ml balsamic vinegar
700 g brown sugar
dried thyme
salt & pepper
Preparation
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Put oil in bottom of cold, large saucepan and set on moderate heat.
Add onions and cook until they begin to soften, 30 - 40 minutes.
Add sugar and stir until dissolved.
Simmer on low heat, uncovered for 20 minutes, stirring occasionally.
Add vinegar and thyme, salt and pepper and cook until onion is caramelised completely and has thickened, approximately 45 minutes.
Cool and store in sterilised jars.
Will keep for several weeks.
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