Preheat oven to gas 6, 200°C, fan 180°C. Place the macadamia nuts on a roasting tray and roast in the oven for 5-7 minutes until golden. Set aside to cool, then chop or place in a small plastic bag and crush with a rolling pin.
To make the dressing, mash Gorgonzola in a bowl with a fork. Stir in the vinegar and olive oil until the dressing is fairly smooth. Season to taste.
Arrange the chicory on plates and then top with the parsley leaves and pear slices. Spoon over the cheese dressing, then garnish with the crushed macadamia nuts and finish with a little freshly ground pepper.