Place the salad ingredients (except the couscous) into a bowl.
Pour dressing over the salad and just before serving, sprinkle with baked couscous.
Dressing:
Place all the ingredients for the dressing in a small jar and shake well. Chill before serving.
Another delicious option is to add 1/2 cup mayonnaise, 1/2 cup water and 2 heaped Tbsp hummus to dressing.