Add oil to heated wok. Add chicken breast. Cook until golden brown, turning occasionally. While chicken is cooking make the teriyaki sauce by combining all ingredients and whisking together. Once the chicken starts to brown add yellow bell pepper, orange bell pepper and diced mango. Let sauté for about 3-4 minutes. Next add teriyaki sauce. Let reduce until thick about 6-8 minutes, add sliced mango about 2-3 minutes before it is completely done reducing. In a separate pan add about 1/2 cup of the teriyaki sauce and reduce for garnish. Serve on a plate of chow mien noodles. Garnish with sliced scallions, toasted sesame seeds, and the separately reduced teriyaki sauce. Enjoy!