Pat the chicken breast dry with a paper towel and cut into bite-sized pieces.
Place chicken in a bowl and toss with arrowroot powder, sea salt, and black pepper until evenly coated.
In a small jar, whisk together the coconut aminos, honey, minced garlic, and grated fresh ginger to create the teriyaki sauce.
Heat the sesame oil in a large non-stick skillet or wok over medium-high heat.
Add the chicken to the skillet in a single layer and cook for 5-6 minutes, turning occasionally, until the edges are golden and crispy.
Add the broccoli florets and 2 tablespoons of water to the pan, then cover with a lid for 2 minutes to steam the broccoli until tender-crisp.
Remove the lid and pour the prepared teriyaki sauce over the chicken and broccoli.
Toss everything together for 1-2 minutes until the sauce thickens into a glossy glaze that coats the ingredients.
Serve the chicken and broccoli over the warm cooked white rice and garnish with sesame seeds.