Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Cut the chicken breast into 1-inch bite-sized cubes and place them on one side of the prepared baking sheet.
Arrange the broccoli florets on the other side of the baking sheet, ensuring they are in a single layer.
Drizzle the chicken and broccoli with avocado oil and season evenly with sea salt and black pepper.
Roast in the oven for 15 to 18 minutes, or until the chicken is cooked through and the broccoli is tender and slightly charred.
While the chicken and broccoli roast, whisk together the orange juice, coconut aminos, rice vinegar, honey, arrowroot powder, grated ginger, and minced garlic in a small saucepan.
Place the saucepan over medium heat and simmer for 3 to 5 minutes, whisking constantly, until the sauce thickens into a glossy glaze.
Steam or sauté the cauliflower rice in a separate pan over medium heat for 4 to 5 minutes until heated through and fluffy.
Once the chicken and broccoli are finished, transfer them to a bowl, pour the orange glaze over them, and toss until well coated.
Serve the glazed orange chicken and broccoli over the warm bed of cauliflower rice.