Pat the chicken breast dry with paper towels and cut into bite-sized cubes.
In a small bowl, toss the chicken with arrowroot powder, sea salt, and black pepper until lightly coated.
Whisk together the orange juice, orange zest, coconut aminos, rice vinegar, honey, and sesame oil in a small ramekin to create the glaze.
Heat avocado oil in a large skillet or wok over medium-high heat. Add the chicken and sear until golden brown and cooked through, about 5-6 minutes. Remove chicken from the pan and set aside.
In the same skillet, add the broccoli florets and sliced red bell pepper with a splash of water. Cover for 2 minutes to steam-soften, then remove the lid and sauté until the water evaporates.
Stir in the minced garlic and grated ginger, cooking for 30 seconds until fragrant.
Return the chicken to the pan and pour the orange glaze over the mixture. Toss constantly for 1-2 minutes until the sauce thickens and coats everything beautifully.
Serve the crispy orange chicken and vegetables over the warm cooked brown rice.