Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Dice the chicken breast into 1-inch cubes and chop the broccoli into bite-sized florets.
Place the chicken and broccoli on the baking sheet, drizzle with avocado oil, and season with sea salt and black pepper.
Toss everything together until evenly coated, then spread into a single layer and roast for 15-18 minutes.
While roasting, combine orange juice, coconut aminos, honey, minced ginger, minced garlic, and arrowroot powder in a small saucepan.
Whisk the sauce over medium heat for 3-4 minutes until it bubbles and thickens into a glossy glaze.
Remove the chicken and broccoli from the oven and transfer them to a large mixing bowl.
Pour the warm orange glaze over the roasted ingredients and toss gently to coat every piece.
Serve immediately, garnished with sesame seeds and thinly sliced green onions.