Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Cut the chicken breast into 1-inch bite-sized cubes and season evenly with sea salt and black pepper.
Place the broccoli florets, sliced carrots, and chopped red bell pepper on the baking sheet, drizzle with olive oil, and toss to coat.
Add the chicken cubes to the baking sheet, spreading all ingredients out in a single layer to ensure even roasting.
Roast in the oven for 15-18 minutes until the chicken is cooked through and the vegetables are tender-crisp.
While the tray is roasting, whisk together the tamari, honey, sesame oil, grated fresh ginger, and minced garlic in a small bowl.
Remove the tray from the oven, pour the sauce over the chicken and vegetables, and toss with a spatula until everything is thoroughly glazed.
Return the tray to the oven for an additional 2 minutes to allow the sauce to thicken and adhere to the chicken and vegetables.