In a small bowl, whisk together the fresh orange juice, coconut aminos, arrowroot powder, minced ginger, and minced garlic to create the glaze.
Cut the chicken breast into bite-sized pieces and season with sea salt and black pepper.
Heat the sesame oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sear until golden brown and cooked through, approximately 5 to 6 minutes, then remove from the pan and set aside.
In the same skillet, add the broccoli florets and sliced red bell pepper, sautéing for 3 to 4 minutes until they are tender-crisp.
Pour the orange glaze mixture into the skillet with the vegetables and stir constantly until the sauce begins to bubble and thicken.
Return the cooked chicken to the skillet and toss thoroughly to coat every piece in the glossy orange glaze.
Steam the cauliflower rice until tender, then serve the chicken and vegetable stir-fry over the rice, garnished with sesame seeds and sliced green onions.