Cut the chicken breast into bite-sized pieces and pat dry with a paper towel.
In a small bowl, toss the chicken with arrowroot powder, sea salt, and black pepper until evenly coated.
Whisk together the coconut aminos, honey, minced ginger, and minced garlic in a separate small bowl to create the teriyaki sauce.
Heat the avocado oil in a large skillet over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and sear until golden brown and cooked through, approximately 5-7 minutes.
While the chicken cooks, steam the broccoli florets until they are bright green and tender-crisp.
Pour the teriyaki sauce mixture over the cooked chicken in the skillet, stirring constantly for 1-2 minutes until the sauce thickens and becomes glossy.
Add the steamed broccoli to the skillet and toss to coat everything in the glaze.
Serve the crispy chicken and broccoli over a bed of warm brown rice and garnish with sesame seeds.