1. Prepare couscous according to package directions. Set aside.
2. In a large skillet, heat oil over medium. Add chicken & cook 5-7 minutes or until golden brown on all sides, stirring frequently.
3. Add onion, pepper & garlic. Sauté 4-5 minutes or until onion is tender.
4. Stir in zucchini, squash, tomatoes & basil. Sauté 4-5 minutes, stirring throughout.
5. Top with parmesan & serve immediately.