Whisk together the orange juice, orange zest, coconut aminos, honey, minced ginger, and minced garlic in a small bowl to create the glaze.
Cut the chicken breast into bite-sized pieces and season evenly with sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet and sauté until golden brown and cooked through, approximately 5-7 minutes.
Remove the chicken from the skillet and set aside; add the broccoli florets and sliced red bell pepper to the same pan.
Stir-fry the vegetables for 3-4 minutes until they are tender-crisp and vibrant in color.
Return the cooked chicken to the skillet and pour the orange glaze over the chicken and vegetables.
Toss everything together for 1-2 minutes until the sauce thickens slightly and coats every piece.
Remove from heat, drizzle with toasted sesame oil, and sprinkle with sesame seeds.
Serve the orange chicken stir-fry immediately over the warm cooked brown rice.