1 can (8 oz.) diced or sliced water chestnuts, rinsed and drained
1/4 cup coarsely chopped walnuts
In a small bowl, combine the hoisin sauce, soy sauce, vinegar, broth and cornstarch. Mix in the sesame oil. Set the seasoning sauce aside.
Set a wok or large frying pan over high heat. Drizzle in 2 teaspoons of the canola oil, swirling to coat the cooking surface. Stir-fry the chicken until it is white. Turn it out onto a plate.
Add the remaining oil to the pan. Stir-fry the green, red, and chile peppers, and the garlic, for 2 minutes. Return the chicken to the pan. Add the water chestnuts and walnuts. Restir the seasoning sauce and add. Stir-fry until the chicken is cooked through. Serve immediately, along with cooked rice, preferably brown.