Cut the chicken breast into bite-sized cubes and season them with sea salt and black pepper.
In a small bowl, whisk together the orange juice, coconut aminos, grated fresh ginger, minced garlic, and arrowroot powder to create the glaze.
Heat the avocado oil in a large skillet or wok over medium-high heat until it begins to shimmer.
Add the chicken to the skillet and cook for 5-6 minutes, stirring occasionally, until golden brown and cooked through.
Remove the chicken from the pan and set aside; add the broccoli, bell pepper, and snap peas to the same skillet.
Stir-fry the vegetables for 3-4 minutes until they are tender-crisp, then return the chicken to the pan.
Pour the orange glaze over the mixture and toss constantly for 1 minute until the sauce thickens and coats the ingredients.
Serve the stir-fry over the warm cooked brown rice and garnish with sesame seeds and sliced green onions.