Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Cut the chicken breast into 1-inch bite-sized cubes and chop 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, grated ginger, and minced garlic until smooth.
Place the chicken and broccoli on the prepared baking sheet and season with sea salt and black pepper.
Pour half of the prepared 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, and sprinkle with sesame seeds before serving warm.