Caramelised Red Onions

2 red onions

3 tbsp brown sugar

1 tbsp olive oil

2 tbsp red wine vinegar

2 tbsp red wine

25g butter

drizzle of honey

Slice onions very thinly.

Toss with sugar and cook together in a pan of butter and olive oil over med-high heat, uncovered, 25 minutes, until starting to caramelise.

Add wine and vinegar and honey. Bring to a boil and then reduce heat to low and cook 15 minutes, stirring, until most of the liquid has evaporated.