Dressing:
Place Perlas in a saucepan of cold water. Bring to the boil then simmer for 15 to 20 minutes, or until tender, then drain.
Place the ingredients for the dressing in a small bowl, season with a little salt and freshly ground pepper, then whisk together.
Put the potatoes into a bowl and whilst still warm pour over half of the dressing, leave to cool. Add the onion, chickpeas, capsicum, tomatoes, olives and parsley, then the remaining dressing, toss together.
Serve at room temperature.
Serves 4-6