In a small bowl, whisk together orange juice, orange zest, tamari, honey, minced ginger, and garlic to create the glaze.
Pat chicken breast dry and cut into 1-inch cubes, then toss with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat sesame oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and cook for 5-6 minutes until golden brown and cooked through, then remove and set aside.
In the same skillet, add broccoli and bell peppers with a splash of water, covering for 2 minutes to steam-sauté until tender-crisp.
Return the chicken to the pan and pour the orange glaze over the mixture, stirring constantly for 1 minute until the sauce thickens and coats everything beautifully.
Serve the crispy orange chicken and vegetables immediately over the warm cooked brown rice.