Chicken:
In a large bowl, add chicken, rice wine vinegar, soy sauce, cornstarch, and salt + pepper. Coat chicken evenly. Set aside until ready to cook.
Sauce:
In a medium bowl, combine all the sauce ingredients. Whisk to combine; set aside.
Stir Fry:
Heat 1½ tablespoon of oil in a large skillet over medium-high heat. Add chicken, and cook for about 4 to 5 minutes. Transfer the chicken to a plate.
In the same skillet used for the chicken, add remaining oil and sauté bell peppers 2-3 minutes. Add garlic and ginger, cook 20-30 seconds. Add the chicken back in the pan. Stir sauce and mix well until fully combined. Simmer over medium-low heat for 2-3 minutes. Finish off with green onions, cashews and a little drizzle of sesame oil. Enjoy!