Roxy's onion marmalade

Ingredients

110g/4oz butter
900g/2lb onions, thinly sliced
2 tbsp granulated sugar
salt and freshly ground black pepper
75ml/3fl oz sherry vinegar or red wine vinegar
2 tbsp grenadine syrup or crème de cassis
½ bottle red wine
To serve
mature cheddar
blue cheese
oatcakes
grainy bread

Method

1. Melt the butter in a medium pan and add the onions. Add the sugar and seasoning. Lower the heat and cover. Simmer for 20 minutes giving an occasional stir.
2. Add the vinegar, grenadine syrup and red wine. Cook, uncovered, over a low heat with more stirring as necessary until the sauce thickens and bubbles slowly. Serve with cheese, oatcakes and grainy bread.