Pat the chicken breast dry with paper towels and cut into bite-sized pieces.
Place the chicken in a bowl and toss with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat avocado oil in a large skillet over medium-high heat. Add chicken and sear until golden brown and cooked through, about 6-8 minutes.
While chicken cooks, whisk together honey, tamari, minced garlic, and grated ginger in a small bowl.
Steam the broccoli florets until tender-crisp and sauté the cauliflower rice in a separate pan until softened.
Pour the honey-garlic sauce into the skillet with the chicken, tossing constantly for 1-2 minutes until the sauce thickens into a glossy glaze.
Divide the cauliflower rice and broccoli into bowls, top with the glazed chicken, and garnish with sesame seeds.