Pat the chicken breast dry with paper towels and season evenly with sea salt and black pepper.
In a small mixing bowl, whisk together the fresh orange juice, orange zest, coconut aminos, minced ginger, minced garlic, and arrowroot powder until smooth.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet and sear for 5-6 minutes, stirring occasionally, until golden brown and cooked through; remove chicken from the pan and set aside.
In the same skillet, add the broccoli, sliced bell peppers, and sugar snap peas, sautéing for 3-4 minutes until they are tender-crisp and bright.
Return the cooked chicken to the skillet and pour the orange sauce mixture over the top.
Toss everything together for 1-2 minutes until the sauce bubbles and thickens into a glossy glaze that coats the chicken and vegetables.
Remove from heat and garnish with sliced green onions and sesame seeds before serving immediately.