Cut the chicken breast into bite-sized pieces and pat them thoroughly dry with a paper towel.
In a medium bowl, toss the chicken with arrowroot powder, sea salt, and black pepper until evenly coated.
In a small jar, whisk together the fresh orange juice, coconut aminos, grated ginger, and minced garlic to create the glaze.
Heat the avocado oil in a large stainless steel skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and sear for 3-4 minutes per side until golden and crispy, then set aside on a plate.
Add the broccoli, red bell pepper, and sugar snap peas to the same skillet, stir-frying for 3 minutes until vibrant and tender-crisp.
Return the chicken to the pan and pour the orange sauce over the mixture, simmering for 1-2 minutes until the sauce thickens and coats everything.
Remove from heat, drizzle with toasted sesame oil, and garnish with sesame seeds before serving.