Cube the chicken breast into bite-sized pieces and pat dry thoroughly with a paper towel.
Place the chicken in a medium bowl and toss with arrowroot powder, sea salt, and black pepper until evenly coated.
In a small glass jar or bowl, whisk together the tamari, honey, sesame oil, minced garlic, and grated ginger to create the teriyaki glaze.
Heat the extra virgin olive oil in a large non-stick skillet over medium-high heat.
Add the chicken to the skillet and sear for 5-6 minutes, turning occasionally, until golden brown and cooked through.
Add the broccoli florets to the pan along with two tablespoons of water, then immediately cover with a lid to steam for 2 minutes.
Remove the lid and pour the prepared sauce over the chicken and broccoli, stirring constantly for 1 minute until the sauce thickens into a glossy glaze.
Serve the crispy chicken and broccoli over the warm brown rice and garnish with thinly sliced green onions.