In a small bowl, whisk together the fresh orange juice, tamari, honey, grated ginger, minced garlic, and arrowroot powder until smooth to create the glaze.
Season the diced chicken breast evenly with the sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet and cook until golden brown and cooked through, approximately 5 to 7 minutes.
Remove the cooked chicken from the pan and set it aside on a plate.
Add the broccoli, sliced bell peppers, and snap peas to the same skillet, sautéing for 3 to 4 minutes until they are tender-crisp.
Return the chicken to the skillet and pour the prepared orange glaze over the chicken and vegetable mixture.
Stir the mixture constantly for 1 to 2 minutes until the sauce thickens and coats all ingredients in a glossy glaze.
Serve the stir-fry immediately over the warm cooked brown rice and garnish with sesame seeds.