Preheat your oven to 400°F (200°C).
In a mixing bowl, combine soy sauce, hoisin sauce, honey, sesame oil, minced garlic, grated ginger, salt, and pepper. Whisk together until well mixed.
Add the chicken pieces to the bowl and toss to coat evenly in the marinade. Allow to marinate for about 10 minutes while you prepare the vegetables.
On a large baking sheet, spread out the marinated chicken, broccoli florets, and diced bell peppers in a single layer. Top with cashews.
Place the baking sheet in the preheated oven and roast for 20-25 minutes, or until the chicken is cooked through and the vegetables are tender.
Remove from the oven and let it cool for a few minutes. Garnish with sliced green onions and sesame seeds before serving.
Serve warm over rice or noodles if desired.