Pat the chicken breast dry with paper towels and cut into 1-inch cubes.
In a medium bowl, toss the chicken cubes with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat the avocado oil in a large non-stick skillet or wok over medium-high heat.
Add the chicken to the skillet and sear until golden brown and cooked through, approximately 5-6 minutes, then remove chicken from the pan and set aside.
Add the broccoli florets and sliced red bell pepper to the same skillet, adding a splash of water if needed to steam-sauté until tender-crisp.
In a small jar, whisk together the honey, tamari, minced garlic, and grated ginger.
Return the chicken to the skillet with the vegetables and pour the honey-garlic sauce over the top.
Stir constantly for 1-2 minutes until the sauce thickens into a glossy glaze that coats everything evenly.
Garnish with sesame seeds and serve immediately while hot.