Duck with pear, endive, gorgonzola and walnut salad

  By Adam Byatt From Saturday Kitchen Ingredients 1 red endive, leaves picked 1 yellow endive, leaves picked ½ bunch watercress leaves picked 150g/5½oz gorgonzola 100ml/3½fl oz milk 30ml/1fl oz olive oil 1 pink grapefruit, peeled and cut into segments, juice …