Pat the chicken breast dry and cut into bite-sized cubes.
In a small bowl, toss the chicken with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat 1 teaspoon of avocado oil in a large skillet or wok over medium-high heat.
Add the chicken and cook for 5-6 minutes until golden brown and cooked through, then remove from the pan.
Add the remaining teaspoon of oil to the pan along with broccoli, bell peppers, and snap peas.
Sauté the vegetables for 3-4 minutes until tender-crisp.
In a small jar, whisk together orange juice, orange zest, coconut aminos, ginger, and minced garlic.
Return the chicken to the pan and pour the orange sauce over the mixture.
Stir constantly for 1-2 minutes until the sauce thickens and coats everything beautifully.
Garnish with sesame seeds and serve immediately.