Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Dice the chicken breast into 1-inch cubes and chop the broccoli, bell peppers, and carrots into bite-sized pieces.
In a small mixing bowl, whisk together the tamari, honey, toasted sesame oil, minced ginger, and minced garlic to create the teriyaki glaze.
Spread the chicken and vegetables across the prepared baking sheet in a single layer, then season with sea salt and black pepper.
Drizzle half of the teriyaki glaze over the chicken and vegetables, tossing well to ensure everything is evenly coated.
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.
Remove from the oven and immediately toss with the remaining glaze while still hot.
Serve the teriyaki chicken and vegetables over the warm cooked brown rice and garnish with sesame seeds.