Step 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.

Step 2

Add the vinegar, grenadine syrup and the 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.