Cook couscous in water as directed on package. Cool uncovered for 20 minutes.
In large bowl, combine all remaining salad ingredients. Add cooked couscous; toss gently to mix.
In small jar with tight-fitting lid, combine all dressing ingredients; shake well. Pour dressing over salad; toss gently. Cover; refrigerate 1 to 2 hours to blend flavors.
Heat oven to 425°F. Line shallow baking pan with foil; spray foil with nonstick cooking spray. In small bowl, combine honey, mustard, 1/4 teaspoon salt and 1/4 teaspoon pepper; blend well. Place chicken breast halves in sprayed foil-lined pan. Spread chicken with half of honey-mustard mixture.
Bake at 425°F. for 20 to 25 minutes or until chicken is fork-tender and juices run clear.
To serve, arrange salad on individual serving plates. Cut chicken crosswise into slices; arrange on top of salads. Drizzle remaining honey-mustard mixture over chicken.