Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Cut the chicken breast into 1-inch cubes and place them in a bowl with the broccoli florets and sliced red bell pepper.
Drizzle the chicken and vegetables with avocado oil and season with sea salt and black pepper, tossing to coat evenly.
Spread the chicken and vegetables in a single layer on the baking sheet and bake for 15 to 18 minutes until the chicken is cooked through.
While the chicken bakes, combine the orange juice, coconut aminos, honey, minced ginger, and minced garlic in a small saucepan over medium heat.
In a small bowl, whisk the arrowroot powder with a teaspoon of water to create a slurry, then whisk it into the saucepan.
Simmer the sauce for 3 to 5 minutes until it thickens into a glossy glaze.
Once the chicken is finished baking, transfer it to a bowl and toss with the warm orange glaze.
Serve the glazed orange chicken and roasted vegetables over the warm cooked brown rice.