To prepare salad, cook pasta in boiling water 11 minutes or until al dente. Add green beans during final 5 minutes of cooking. Drain and rinse pasta mixture under cold water. Place pasta mixture, chicken, celery, bell pepper, and onion in a large bowl; toss gently to combine.
To prepare dressing, combine 2 tablespoons water and remaining ingredients, stirring with a whisk. Drizzle over pasta mixture, tossing gently to coat.
MyRecipes is working with Let's Move!, the Partnership for a Healthier America, and USDA's MyPlate to give anyone looking for healthier options access to a trove of recipes that will help them create healthy, tasty plates. For more information about creating a healthy plate, visit www.choosemyplate.gov.