Pat the chicken breast dry with a paper towel and season both sides with sea salt and black pepper.
In a small glass bowl, whisk together the orange juice, coconut aminos, arrowroot powder, minced fresh ginger, and minced garlic to create the glaze.
Heat the avocado oil in a large skillet over medium-high heat until shimmering, then add the chicken and sear for 5-6 minutes per side until golden and cooked through.
Remove the chicken from the skillet and set aside; in the same pan, add the broccoli florets, sliced red bell pepper, and cauliflower rice.
Sauté the vegetables for 4-5 minutes until they are tender-crisp and the cauliflower rice is lightly toasted.
Slice the chicken into strips and return it to the skillet, then pour the orange glaze mixture over everything.
Toss constantly for 1-2 minutes until the sauce thickens into a glossy coating, then garnish with sesame seeds and serve immediately.