Cut the chicken breast into bite-sized pieces and season evenly with sea salt and black pepper.
In a small bowl, whisk together the fresh orange juice, coconut aminos, honey, minced ginger, minced garlic, and arrowroot powder until smooth.
Heat the avocado oil in a large skillet over medium-high heat until shimmering.
Add the chicken to the skillet and cook, stirring occasionally, until golden brown and cooked through, about 6 to 8 minutes.
While the chicken is cooking, steam the broccoli florets in a steamer basket over boiling water until they are bright green and tender-crisp, about 4 to 5 minutes.
Pour the orange glaze mixture into the skillet with the chicken and stir constantly for 1 to 2 minutes until the sauce thickens and becomes glossy.
Divide the steamed broccoli between plates, top with the glazed chicken, and garnish with sesame seeds and sliced green onions.