Cut the chicken breast into bite-sized cubes and place them in a bowl with the arrowroot powder, sea salt, and black pepper, tossing until each piece is thoroughly coated.
In a small mixing bowl or jar, whisk together the tamari, fresh orange juice, orange zest, raw honey, minced ginger, and minced garlic 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 crispy.
While the chicken is cooking, place the broccoli florets in a steamer basket over boiling water and steam for 4-5 minutes until they are bright green and fork-tender.
Lower the heat on the skillet and pour the orange glaze over the crispy chicken, stirring constantly for 1-2 minutes until the sauce thickens and becomes glossy.
Transfer the glazed chicken and steamed broccoli to a plate, then garnish with sesame seeds for a final touch of crunch.