
Heat oven to 425°F. Grease a large baking sheet with cooking spray, and set aside.
Combine the chicken and stir-fry sauce together in a large bowl, and toss until combined. Refrigerate and let the chicken marinate while you chop the remaining veggies. (Or you can let it marinate in the refrigerator in a sealed container for up to 8 hours in advance for maximum flavor.)
Once the veggies are ready, add them to the bowl with the chicken, and toss until the veggies are evenly coated with the sauce.
Turn the chicken and veggies out onto the prepared baking sheet, and spread them out so that they are in an even layer.
Bake for 14-16 minutes, stirring once halfway through, until the chicken is cooked through and no longer pink inside.
Remove from the oven and serve immediately.
Whisk all ingredients together until combined.