Combining the Ingredients: Return the cooked chicken to the skillet with the vegetables. Add the cashews and the prepared sauce. Stir well to combine all the ingredients. Cook for another 2-3 minutes until the sauce thickens and coats the chicken and vegetables evenly.
Final Touches: Do a taste test and adjust seasoning if necessary. The sauce should have a balanced flavor of sweetness, saltiness, and a hint of sourness.
Serving: Serve the Cashew Chicken hot, ideally over a bed of steamed rice or noodles. Garnish with green onions or sesame seeds if desired.