Cut the chicken breast into 1-inch cubes and pat them dry with a paper towel to ensure a crispy sear.
In a small bowl, whisk together the orange juice, orange zest, coconut aminos, honey, minced ginger, and minced garlic to create the sauce.
In a separate bowl, toss the chicken cubes with arrowroot powder, sea salt, and black pepper until each piece is lightly and evenly coated.
Heat the avocado oil in a large skillet over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and sear for 3-4 minutes per side until golden brown and crispy.
Add the broccoli florets and 2 tablespoons of water to the pan; cover with a lid and steam for 2 minutes until bright green.
Remove the lid and pour the orange sauce mixture over the chicken and broccoli, stirring to combine.
Simmer for 1 minute until the sauce reduces and thickens into a glossy glaze that coats everything.
Garnish with sesame seeds and sliced green onions before serving immediately.