Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Cut the chicken breast into one-inch bite-sized cubes and break the broccoli into small, uniform florets.
In a small mixing bowl, whisk together the orange juice, coconut aminos, rice vinegar, honey, sesame oil, arrowroot powder, minced garlic, and grated ginger until smooth.
Place the chicken cubes and broccoli florets onto the prepared baking sheet and season them with sea salt and black pepper.
Pour half of the orange glaze over the chicken and broccoli, tossing thoroughly to ensure every piece is well coated.
Spread the mixture into a single layer and bake for 15 to 18 minutes until the chicken is cooked through and the broccoli is tender-crisp.
Remove from the oven, drizzle with the remaining glaze for extra flavor, and garnish with sesame seeds before serving hot.