In a small bowl, whisk together the orange juice, coconut aminos, minced ginger, and minced garlic until well combined.
Pat the chicken breast dry with paper towels, cut into bite-sized pieces, and toss in a bowl with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat the avocado oil in a large skillet or wok 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.
Toss in the broccoli florets and sliced red bell pepper, sautéing for 5 minutes until the vegetables are crisp-tender.
Pour the orange sauce over the chicken and vegetables, stirring constantly for 1-2 minutes until the glaze thickens and looks glossy.
Remove from heat and garnish with freshly sliced green onions before serving.