Preheat oven to 400°F and line a baking sheet with parchment paper.
Cut the chicken breast into 1-inch cubes and season with sea salt and black pepper.
Toss chicken with sesame oil and spread in a single layer on the baking sheet.
Bake for 15-18 minutes or until the chicken is cooked through and slightly golden.
In a small saucepan over medium heat, whisk together the orange juice, orange zest, coconut aminos, rice vinegar, honey, arrowroot powder, minced ginger, and minced garlic.
Whisk the sauce constantly until it reaches a simmer and thickens into a glossy glaze.
Steam the broccoli florets for 4-5 minutes until they are bright green and tender-crisp.
Toss the baked chicken cubes in the orange glaze until well coated.
Serve the glazed chicken and steamed broccoli over the cooked brown rice.