Start by dicing the yellow onion and red bell pepper into bite-sized pieces. Slice the scallions thinly, mince the garlic, and cut the chicken tenders or breasts into evenly sized chunks for quick, uniform cooking.
In a small mixing bowl, whisk together 1/2 cup cold water, hoisin sauce, soy sauce, granulated sugar, corn starch, Worcestershire sauce, sesame oil, minced garlic, and ground ginger. Set this flavorful mixture aside.
Heat 2 tablespoons olive oil in your skillet or wok over medium-high heat. Season the chicken with salt and pepper, then add it to the hot pan. Stir-fry until golden brown and cooked through, about 5-7 minutes. Remove the chicken from the skillet and set aside.
In the same skillet, add the diced onion and red bell pepper. Toss in the dried red chiles (adjust quantity for your preferred heat level). Stir-fry for 3-4 minutes until the vegetables soften slightly but still retain some crunch.
Return the cooked chicken to the skillet with the vegetables. Pour in the prepared sauce mixture and stir continuously. The sauce will thicken and coat the chicken and veggies in a glossy glaze within a few minutes.
Just before serving, fold in the salted and roasted peanuts and sliced scallions. Give everything a final toss to combine and heat through.
Serve hot, ideally over steamed rice or alongside your favorite grain. Enjoy the layers of flavor and texture in every bite.