Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Cut the chicken breast into bite-sized cubes and slice the broccoli, bell pepper, and carrots into uniform pieces.
Place the chicken and vegetables on the baking sheet, drizzle with olive oil, and sprinkle with sea salt and black pepper.
Toss everything together until well-coated, then spread into a single layer.
Roast in the oven for 18 to 20 minutes, or until the chicken is cooked through and the vegetables are tender-crisp.
While roasting, whisk together the tamari, honey, sesame oil, grated ginger, and minced garlic in a small bowl.
Remove the tray from the oven, pour the sauce over the chicken and vegetables, and toss to glaze everything evenly.
Return to the oven for 2 minutes to allow the sauce to thicken slightly.
Serve immediately garnished with sesame seeds.