Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Dice the chicken breast into uniform 1-inch cubes and season them evenly with sea salt and black pepper.
In a small mixing bowl, whisk together the orange juice, coconut aminos, honey, grated ginger, minced garlic, and arrowroot powder until smooth.
Arrange the chicken cubes, broccoli florets, and chopped red bell pepper on the prepared baking sheet.
Drizzle half of the orange glaze over the chicken and vegetables, tossing well to ensure every piece is lightly coated.
Bake in the center of the oven for 15 to 18 minutes, or until the chicken is fully cooked and the broccoli is tender-crisp.
While the chicken bakes, add the cauliflower rice to a non-stick skillet with the toasted sesame oil and sauté over medium heat for 5 minutes.
Remove the tray from the oven, pour the remaining glaze over the hot chicken and broccoli, and toss once more.
Divide the sautéed cauliflower rice into bowls, top with the orange chicken mixture, and garnish with sesame seeds before serving.