In a small bowl, whisk together the orange juice, orange zest, tamari, grated ginger, minced garlic, and arrowroot powder to create the glaze.
Season the diced chicken breast 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 cook until golden brown and cooked through, about 5-7 minutes.
Remove the chicken from the pan and set aside; add the broccoli florets and sliced red bell pepper to the same skillet with a splash of water.
Steam-sauté the vegetables for 3-4 minutes until they are tender-crisp.
Return the chicken to the skillet and pour the orange glaze over the mixture.
Stir constantly for 1-2 minutes until the sauce thickens and coats everything beautifully.
Serve the orange chicken and vegetables over a bed of steamed cauliflower rice.
Garnish with sliced green onions before serving.