INGREDIENTS 1 Tbsp Dijon mustard 1 tsp wholegrain mustard 3 Tbsp extra virgin olive oil 2 tsp cider vinegar a pinch of sea salt, freshly ground black pepper and brown sugar METHOD: For the dressing, whisk all the ingredients together to combine. Add to the pan of warm leeks and beans and stir well. Here served with Warm Leek & White Beans Salad .