Pat the chicken breast dry and cut into bite-sized cubes.
In a medium bowl, toss the chicken with arrowroot powder, sea salt, and black pepper until each piece is lightly coated.
Whisk together the honey, tamari, minced garlic, and grated ginger in a small ramekin to prepare the glaze.
Heat the toasted sesame oil in a large non-stick skillet over medium-high heat.
Add the chicken to the skillet in a single layer and sear for 5-6 minutes, turning occasionally, until golden and crispy on the edges.
Add the broccoli florets and sliced red bell pepper to the pan, sautéing with the chicken for another 3-4 minutes until vegetables are bright and tender-crisp.
Pour the honey-garlic glaze over the mixture and stir constantly for 1 minute until the sauce bubbles and thickens into a sticky coating.
Divide the warm cooked brown rice into a bowl and top with the honey-garlic chicken and vegetable mixture.
Garnish with sesame seeds and sliced green onions before serving immediately.