Pat the chicken breast dry with a paper towel 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.
In a small jar, whisk together the honey, tamari, toasted sesame oil, minced garlic, and grated fresh ginger to create the sauce.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and cook for 5-6 minutes, turning occasionally, until the edges are crispy and golden brown.
Add the broccoli florets and sliced red bell pepper to the skillet, stir-frying for 3-4 minutes until the vegetables are tender-crisp.
Pour the honey-garlic sauce over the chicken and vegetables, tossing constantly for 1 minute until the sauce thickens into a glossy glaze.
Remove from heat and garnish with sesame seeds before serving.