Heat the oil in a wok or large skillet over high heat. Fry the beef in 2 batches in the hot oil, turning once, until crispy and golden, about 2 minutes on each side or less if using smaller pieces. Remove the beef from the pan and set aside on paper towel lined plate. Carefully drain the oil from the wok or skillet.

In a medium bowl mix the marmalade, garlic, vinegar, ginger, soy sauce and orange juice and whisk until well combined. Add to the wok, over high heat, and cook for 2 minutes. Stir in the broccoli, cook the broccoli until slightly tender and the sauce is thick, about 3 to 5 minutes. Stir in the beef, then transfer to a serving platter. Serve immediately, or set aside to reheat later.

Use orange peel for garnish if desired