In a mixing bowl, combine soy sauce, cornstarch, and sesame oil. Add chicken pieces and toss to coat. Let marinate for 15 minutes.

In a separate bowl, whisk together chicken broth, honey, lemon juice, lemon zest, ginger, and garlic. Set aside.

Heat a skillet over medium-high heat. Add marinated chicken and cook until browned and cooked through, about 5-7 minutes.

Add broccoli, bell pepper, and carrot to the skillet. Stir-fry for 3-4 minutes until vegetables are tender-crisp.

Pour the sauce over the chicken and vegetables. Stir to combine and cook for an additional 2-3 minutes until the sauce thickens. Garnish with green onions and sesame seeds before serving.