In a small bowl, whisk together the soy sauce, honey, sesame oil, minced garlic, and grated ginger.
Heat a pan or wok over medium-high heat and add the sliced chicken. Cook until browned and cooked through, about 5-6 minutes.
Remove the chicken from the pan and set aside.
In the same pan, add the red bell pepper and carrot. Stir-fry for 2-3 minutes until slightly softened.
Add the spinach leaves and cook until wilted.
Return the chicken to the pan and pour in the soy sauce mixture.
Stir-fry for another 2-3 minutes to coat the chicken and vegetables in the sauce.
Sprinkle with cashews and green onions before serving.
Serve hot over rice or noodles.