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 red bell pepper into thin strips.
Place the chicken, broccoli florets, and bell peppers on the baking sheet, then drizzle with the toasted sesame oil and season with sea salt and black pepper.
Toss everything well to coat and spread into a single layer, ensuring the chicken is not overcrowded.
Roast in the oven for 15 to 18 minutes, or until the chicken is cooked through and the vegetables are tender-crisp.
While the chicken roasts, whisk together the tamari, honey, minced ginger, and minced garlic in a small saucepan over medium-low heat.
Simmer the sauce for 3 to 5 minutes until it thickens slightly into a glossy glaze.
Remove the baking sheet from the oven, pour the glaze over the roasted chicken and vegetables, and toss to coat thoroughly.
Serve the teriyaki chicken and vegetables over the warm cooked brown rice and garnish with sesame seeds.