In a small bowl, whisk together orange juice, coconut aminos, arrowroot powder, grated ginger, and minced garlic to create the glaze.
Season the diced chicken breast with sea salt and black pepper.
Heat sesame oil in a large skillet or wok over medium-high heat.
Add chicken to the skillet and sear until golden brown and cooked through, then remove and set aside.
In the same skillet, add broccoli and bell peppers with a splash of water, covering for 2 minutes to steam-sauté until crisp-tender.
Return the chicken to the pan and pour the orange glaze over the mixture, stirring constantly until the sauce thickens and coats everything.
In a separate pan or microwave, warm the cauliflower rice and brown rice together until heated through.
Serve the orange chicken and vegetables over the rice blend, garnishing with sesame seeds and sliced green onions.