Pat the chicken breast dry with a paper towel and cut into 1-inch cubes.
Place the chicken in a bowl and toss with arrowroot powder, sea salt, and black pepper until evenly coated.
In a small glass jar or bowl, whisk together the honey, tamari, and minced garlic cloves.
Heat the olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and cook for 6-8 minutes, turning occasionally, until golden brown and crispy on all sides.
While the chicken cooks, steam the broccoli florets in a steamer basket over boiling water for 4-5 minutes until tender-crisp.
Reduce the skillet heat to medium and pour the honey-garlic sauce over the chicken.
Simmer for 1-2 minutes, stirring constantly, until the sauce thickens into a sticky glaze that coats the chicken.
Assemble the bowls by placing the cooked brown rice at the bottom and topping with the steamed broccoli and glazed chicken.
Garnish with toasted sesame seeds and sliced green onions before serving.