In a small bowl, whisk together orange juice, orange zest, tamari, fresh ginger, minced garlic, and arrowroot powder to create the glaze.
Season the diced chicken breast with sea salt and black pepper.
Heat sesame oil in a large skillet or wok over medium-high heat.
Add chicken to the skillet and cook until golden brown and cooked through, about 5-7 minutes.
Remove chicken from the pan and set aside.
Add broccoli, bell peppers, and snap peas to the same skillet, stir-frying for 3-4 minutes until crisp-tender.
Return the chicken to the skillet and pour the orange glaze over the mixture.
Toss everything together for 1-2 minutes until the sauce thickens and coats the ingredients.
Serve the stir-fry over the warm cooked brown rice.