Cut the chicken breast into bite-sized cubes and season evenly with sea salt and black pepper.
In a small bowl, whisk together the fresh orange juice, coconut aminos, rice vinegar, and arrowroot powder until smooth to create the glaze.
Heat the toasted sesame oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sauté until golden brown and cooked through, approximately 5-7 minutes, then remove chicken from the pan and set aside.
Add the broccoli florets to the same skillet with a tablespoon of water; cover with a lid to steam for 2-3 minutes until bright green and tender-crisp.
Remove the lid and stir in the minced garlic and grated ginger, sautéing for 30 seconds until fragrant.
Return the cooked chicken to the skillet and pour the orange glaze mixture over the ingredients.
Toss constantly for 1-2 minutes until the sauce bubbles and thickens into a glossy coating.
Garnish with thinly sliced green onions and serve immediately.