In a medium saucepan, bring chicken stock , water and salt to a boil. Add couscous in a slow and steady steam, stir until liquid has been absorbed. Turn off heat. Cover and let stand 2 minutes or until couscous is tender.

Spread couscous on a 15 x 10 x 1 baking sheet or other large container. Let cool 10 to 15 minutes. Separate clumps of couscous into individual grains by rubbing them between your palms or with a spatula.

When couscous is cool, transfer to a large bowl. Add 1 cup of orange juice, orange peel and cilantro, toss to blend. You can always do this ahead of time and refrigerate up to 1 day.

Before serving add oil, radishes , toasted pine nuts or walnuts, vinegar and remaining 1/4 cup orange juice, mix well. Season with Salt and Pepper and serve immediately.