Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Cut the chicken breast into 1-inch cubes and chop the broccoli, bell pepper, and carrots into uniform, bite-sized pieces.
Place the chicken and vegetables on the prepared sheet pan, drizzle with olive oil, and season with sea salt and black pepper.
Toss everything thoroughly to ensure an even coating of oil and spices, 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 with slightly charred edges.
While the tray is roasting, whisk together the tamari, honey, minced ginger, minced garlic, and sesame oil in a small bowl.
Remove the pan from the oven, pour the tamari glaze over the chicken and vegetables, and toss well to coat every piece.
Return the pan to the oven for an additional 2 minutes to allow the sauce to thicken and adhere to the ingredients.
Garnish with sesame seeds and serve immediately while hot.