Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Cut the chicken breast into bite-sized cubes and place them on the baking sheet along with the broccoli florets.
Drizzle the chicken and broccoli with avocado oil, then sprinkle with sea salt and black pepper, tossing well to ensure even coating.
Spread the ingredients into a single layer and bake for 15-18 minutes, or until the chicken is cooked through and the broccoli is slightly charred.
While the chicken bakes, combine orange juice, coconut aminos, rice vinegar, honey, arrowroot powder, minced garlic, grated ginger, and red pepper flakes in a small saucepan.
Whisk the sauce over medium heat for 3-5 minutes until it simmers and thickens into a glossy, pourable glaze.
Remove the chicken and broccoli from the oven, transfer to a large mixing bowl, and pour the warm orange sauce over the top.
Toss everything gently until the chicken and broccoli are thoroughly coated in the citrus glaze and serve immediately.