Cut the chicken breast into bite-sized cubes and season evenly with sea salt and black pepper.
In a small bowl, whisk together the orange juice, orange zest, coconut aminos, minced ginger, minced garlic, and arrowroot powder to create the glaze.
Heat the avocado 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 5-6 minutes, then transfer the chicken to a plate.
In the same skillet, add the broccoli florets and sliced red bell pepper with a tablespoon of water; cover and steam for 2-3 minutes until tender-crisp.
Return the chicken to the skillet and pour the orange glaze over the top.
Toss everything together for 1-2 minutes until the sauce thickens and becomes glossy, coating every piece.
In a separate small pan, lightly sauté the cauliflower rice for 3 minutes until heated through and fluffy.
Plate the cauliflower rice and top with the orange chicken stir-fry.
Finish the dish with a drizzle of toasted sesame oil and a sprinkle of sesame seeds.