In a small bowl, whisk together the orange juice, coconut aminos, honey, grated ginger root, and minced garlic to create the glaze.
Pat the chicken breast dry with a paper towel, cut into bite-sized pieces, and toss in a bowl with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sear for 5-6 minutes, turning occasionally, until golden brown and cooked through, then remove chicken from the pan and set aside.
Add the broccoli florets and sliced red bell pepper to the same skillet, sautéing for 3-4 minutes until they are vibrant and crisp-tender.
Pour the orange glaze into the skillet with the vegetables and simmer for 1-2 minutes until the sauce begins to thicken and turn glossy.
Return the chicken to the skillet, drizzle with sesame oil, and toss everything together to ensure the chicken and vegetables are thoroughly coated in the sauce.
Serve the stir-fry immediately over the warm cooked brown rice and garnish with sesame seeds.