Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Cut the chicken breast into bite-sized 1-inch cubes and season evenly with sea salt and black pepper.
In a small mixing bowl, whisk together the orange juice, coconut aminos, honey, minced ginger, minced garlic, and arrowroot powder until smooth.
Place the chicken cubes, broccoli florets, and sliced red bell pepper onto the prepared baking sheet.
Drizzle the sesame oil over the chicken and vegetables, tossing them gently to ensure everything is lightly coated.
Spread the ingredients into a single layer and bake for 12-15 minutes, or until the chicken is cooked through and the broccoli is crisp-tender.
While the chicken bakes, prepare the brown rice according to the package directions if not already cooked.
Pour the orange sauce mixture into a small saucepan over medium heat and simmer for 2-3 minutes until it thickens into a glossy glaze.
Remove the baking sheet from the oven, pour the thickened glaze over the chicken and vegetables, and toss to coat thoroughly.
Serve the glazed chicken and vegetables over the fluffy brown rice, garnished with sesame seeds and sliced green onions.