Pat the chicken breast dry and cut into bite-sized cubes.
Place chicken in a bowl and toss 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 cook until golden brown and crispy on all sides, about 5 to 6 minutes, then remove and set aside.
In the same skillet, add the broccoli florets and sliced red bell pepper with a tablespoon of water, covering for 2 minutes to steam until crisp-tender.
While the vegetables cook, whisk together the orange juice, coconut aminos, grated ginger, minced garlic, and sesame oil in a small bowl.
Return the chicken to the skillet and pour the orange sauce over the chicken and vegetables.
Stir-fry for another 1 to 2 minutes until the glaze thickens and coats the ingredients thoroughly.