Pat the chicken breast dry and cut into bite-sized pieces, then season with sea salt and toss in arrowroot powder until lightly coated.
Whisk together coconut aminos, rice vinegar, honey, minced ginger, minced garlic, and red pepper flakes in a small bowl to create the sauce.
Heat avocado oil in a large skillet over medium-high heat and sear the chicken until golden brown and cooked through, then remove and set aside.
In the same skillet, add the broccoli, snap peas, and bell pepper with a splash of water, covering for 2 minutes to steam-sauté until tender-crisp.
Return the chicken to the pan, pour the sauce over the mixture, and stir constantly for 1-2 minutes until the glaze thickens and coats everything.
Remove from heat, drizzle with toasted sesame oil, and garnish with sesame seeds before serving.