Cook rice according to package directions. Set aside
In a medium bowl combine 2 Tbsp. cornstarch, salt and pepper. Add chicken and toss to coat.
In a large skillet heat canola and sesame oil over medium-high heat.. Add chicken and cook until golden brown and chicken is almost finished cooking. (approx. 6-8 min.)
While chicken is cooking, wisk together chicken broth, hoisin, honey, soy sauce, rice vinegar (if using), ginger and ½ teaspoon corn starch.
When chicken is just about finished cooking add hoisin sauce mix and toss to coat . Cook for a minute or so until sauce starts to thicken. Add red bell peppers, celery, water chestnuts and cashews and mix to coat. Cook for an additional 1-2 min. until vegetables are cooked to your taste (I like them a little crispy so I cook for only about 1 min.)
Serve over rice, and garnish with sliced green onions.
Notes
* ingredients for sauce make enough to coat chicken and vegetables, if you prefer more sauce to serve over the rice, you may want to double to amounts listed.