Cut the chicken breast into bite-sized cubes and season with sea salt and black pepper.
In a small bowl, whisk together the fresh orange juice, coconut aminos, rice vinegar, grated ginger, minced garlic, and arrowroot powder to create the glaze.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the pan and sear until golden brown and cooked through, approximately 5-7 minutes.
Remove the chicken from the pan and set aside; add the broccoli, bell peppers, and snap peas to the same skillet.
Stir-fry the vegetables for 3-4 minutes until they are tender-crisp and bright in color.
Return the cooked chicken to the pan and pour the prepared orange glaze over the mixture.
Toss everything together for 1-2 minutes until the sauce thickens and coats the chicken and vegetables beautifully.
Drizzle with sesame oil and serve immediately in a bowl, garnished with toasted sesame seeds.