Cook the brown rice in a small saucepan according to package directions until tender.
While the rice cooks, cut the chicken breast into 1-inch cubes and toss them in a bowl with the arrowroot powder, sea salt, and black pepper until evenly coated.
In a small jar or bowl, whisk together the honey, tamari, sesame oil, minced garlic, and grated fresh ginger to create the glaze.
Heat the avocado oil in a large non-stick skillet over medium-high heat. Add the chicken pieces in a single layer and sear for 3-4 minutes per side until golden brown and cooked through.
Steam the broccoli florets in a steamer basket over boiling water for 4-5 minutes until they are bright green and crisp-tender.
Lower the skillet heat to medium and pour the honey-garlic glaze over the chicken. Stir constantly for 1-2 minutes until the sauce bubbles and thickens into a sticky coating.
Divide the cooked brown rice and steamed broccoli into a bowl, top with the glazed chicken, and garnish with sesame seeds and sliced green onions.