Cut the chicken breast into bite-sized cubes and toss in a bowl with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat sesame oil in a large skillet over medium-high heat. Add the chicken and sear for 5-6 minutes, turning occasionally until golden brown and cooked through.
Remove the chicken from the pan and set aside. Add the broccoli florets to the same pan with two tablespoons of water, cover, and steam for 3 minutes until bright green and tender.
In a small bowl, whisk together the orange juice, coconut aminos, honey, minced fresh ginger, and minced garlic.
Return the chicken to the skillet with the broccoli and pour the orange sauce over the top.
Simmer for 1-2 minutes until the sauce thickens into a glossy glaze that coats the chicken and vegetables.
Garnish with fresh orange zest and serve immediately.