Heat broth and seasoning packet from couscous in the microwave on HIGH for 3 to 5 minutes or until broth begins to boil. Place couscous in a large bowl, and stir in broth mixture. Cover and let stand 5 minutes.
Fluff couscous with a fork; stir in chicken and next 6 ingredients. Serve warm or cold. Garnish, if desired.
Tip: You'll need to buy a 2/3-ounce package of fresh basil and 1 rotisserie chicken to get the right amount of basil and chicken for this recipe. Substitute 4 teaspoons of dried basil if you can't find fresh.