Can you recommend an Israeli couscous recipe to go with this dish?

I agree with Maedl that you might want to go with something simple so that the spices in the chicken shines. But I can also see something like this working: http://www.epicurious.com/recipes/food/views/Israeli-Couscous-with-Roasted-Butternut-Squash-and-Preserved-Lemon-102250

The chicken and olive combination is full of flavor--all you need to accompany it is plain, steamed couscous. If you make the couscous the traditional Moroccan way, steaming it over the cooking pot of chicken, it will take on the flavor of the juices.