This is a perfect accompaniment to my Foie Gras Burgers! You will have to wait for that recipe!
- 4 Medium Onions (red) – finely sliced
- 50 gms of butter
- 3 tbsp of brown sugar
- 2 tbsp of vinegar
- 1 tbsp of balsamic vinegar
Cook the onions in the butter over a low heat for about 15 minutes until soft.
Add the remaining ingredients and cook until the liquid is syrupy. Cool and then strore in the fridge until required.