In a small bowl, whisk together the coconut aminos, honey, grated fresh ginger, and minced garlic to create the teriyaki base.
In a separate tiny ramekin, mix the arrowroot powder and water until smooth to create a slurry for thickening.
Cut the chicken breast into bite-sized pieces and season with sea salt and black pepper.
Heat the toasted sesame oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sear for 4-5 minutes until golden brown and cooked through, then remove chicken and set aside.
Add the broccoli florets to the same skillet with a splash of water; cover and steam for 2-3 minutes until bright green and tender-crisp.
Return the chicken to the pan and pour in the teriyaki sauce mixture, stirring to coat.
Pour in the arrowroot slurry and stir constantly for 1 minute until the sauce thickens into a glossy glaze.
Serve the chicken and broccoli over the warm cooked brown rice.
Garnish with sesame seeds and sliced green onions before serving.