1Spray 12-inch nonstick skillet with cooking spray. Add stir-fry vegetables to skillet; cook 2 to 3 minutes, stirring frequently, until crisp-tender.
2Stir in corn, salsa, beans and frozen chicken. Heat to boiling. Reduce heat to low; cover and simmer about 5 minutes, stirring occasionally, until chicken is thoroughly heated (break up large pieces of chicken with spoon as mixture cooks).
3Meanwhile, heat water to boiling. Stir in couscous. Remove from heat; cover and let stand 5 minutes.
4Fluff couscous with fork; spoon onto serving plates. Top with chicken mixture. Sprinkle with cilantro.