Heat a couple of inches of frying oil in a medium pot or deep skillet. Toss beef with cornstarch and fry in hot oil until crispy. Drain and pour off all but a couple of tablespoons oil from the pan.
Cut a few strips of rind off the orange and thinly slice.
Over high heat in the same pan, stir-fry the orange rind, ginger, garlic, chilies, onions and broccoli florets until tender crisp, 3 minutes. Add sugar and soy, or Kejap Manis, the juice of orange and lime juice, and reserved beef. Toss to combine, 1-2 minutes more. Serve over rice with peanuts on top.