In a small bowl, whisk together the orange juice, tamari, honey, minced ginger, minced garlic, and arrowroot powder until the mixture is smooth and well combined.
Cut the chicken breast into bite-sized pieces and season evenly with 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 sear until golden brown and cooked through, approximately 5 to 6 minutes.
Incorporate the broccoli florets, sliced red bell pepper, and snap peas into the skillet, sautéing for 3 to 4 minutes until they are tender-crisp.
Pour the prepared orange sauce over the chicken and vegetables, stirring constantly as the sauce bubbles and thickens into a glossy glaze.
Remove the skillet from the heat, drizzle with toasted sesame oil, and garnish with sesame seeds before serving hot.