Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
In a small mixing bowl, whisk together the orange juice, coconut aminos, honey, minced garlic, grated ginger, and arrowroot powder until smooth.
Cut the chicken breast into bite-sized cubes and place them on the baking sheet along with the broccoli florets.
Drizzle the avocado oil over the chicken and broccoli, then season with sea salt and black pepper, tossing well to coat.
Pour half of the prepared orange sauce over the chicken and broccoli, tossing again to ensure even coverage.
Spread the mixture into a single layer and bake for 15 to 18 minutes, or until the chicken is cooked through and the broccoli is tender.
Remove from the oven and drizzle the remaining sauce over the hot chicken and broccoli.
Serve immediately over warm cooked brown rice and garnish with sesame seeds.