Pat the chicken breast dry with a paper towel and cut into 1-inch cubes.
In a small bowl, toss the chicken cubes with arrowroot powder, sea salt, and black pepper until evenly coated.
In a separate small jar, whisk together the fresh orange juice, orange zest, coconut aminos, honey, minced ginger, and minced garlic to create the glaze.
Heat the toasted sesame oil in a large non-stick skillet or wok over medium-high heat.
Add the chicken to the skillet and cook for 5-6 minutes, turning occasionally, until the exterior is golden brown and crispy.
Remove the chicken from the pan and set aside; immediately add the broccoli and sliced red bell peppers to the same pan with a splash of water.
Sauté the vegetables for 3-4 minutes until they are tender-crisp and vibrant in color.
Return the chicken to the pan and pour the prepared orange glaze over the mixture.
Toss everything constantly for 1 minute until the sauce thickens into a glossy glaze that coats the chicken and vegetables.
Serve the stir-fry immediately over the warm cooked brown rice and garnish with sliced green onions.