Coleslaw is one of those side dishes that commonly appears at barbecues and pot luck dinners. This recipe is the perfect one for those occasions since you can prepare it in minutes, especially if you have a food processor. All you need is green cabbage, carrots, cooking onion and for the dressing mayonnaise, sugar, buttermilk, white wine vinegar and salt and pepper. Serve it immediately or let the flavour develop for 2 -24 hours in the fridge overnight.