Preheat your oven to 400°F.
Place the broccoli florets on a baking sheet and toss with 0.5 tbsp of avocado oil, sea salt, and black pepper.
Roast the broccoli for 15-20 minutes until the edges are charred and tender.
While the broccoli roasts, cut the chicken breast into 1-inch cubes and toss them in a bowl with the arrowroot powder until lightly coated.
Heat the remaining 0.5 tbsp of avocado oil in a large skillet over medium-high heat.
Add the chicken cubes to the skillet and sear for 5-7 minutes, turning occasionally, until they are golden brown and cooked through.
In a small bowl, whisk together the orange juice, coconut aminos, minced fresh ginger, and minced garlic.
Pour the orange sauce mixture into the skillet with the chicken and simmer for 2-3 minutes until the glaze is thick and glossy.
Serve the crispy orange chicken immediately over the roasted broccoli and garnish with sesame seeds.