Make the sauce: In a glass jar or small bowl combine orange juice, tamari (or soy sauce), honey, chopped pickled ginger and the tablespoon of ginger juice, gochujang, and 1 tablespoon toasted sesame oil; stir or shake until smooth.
Heat 3 tablespoons sesame oil in a large skillet over medium heat.
Add the ground chicken, arrowroot powder (or cornstarch), and a pinch of black pepper and chili flakes; break up the meat and cook, stirring occasionally, until browned and mostly cooked through, about 5 minutes.
Add the butter and chopped garlic to the skillet; cook 2 minutes until the butter browns slightly and the chicken becomes crispy.
Pour the prepared sauce over the chicken and stir to combine; cook until the sauce thickens slightly, about 1–2 minutes.
Add the chopped broccoli to the skillet and cook 2–5 minutes more until the broccoli is tender-crisp and everything is heated through.
Remove from heat and serve the chicken and broccoli over rice if desired; top with toasted sesame seeds or peanuts and chopped green onions.