Clean the skin thoroughly and remove any hairs.
Puncture only the skin (not the meat) with a meat tenderizer or fork.
Rub the entire shoulder, including the skin, with fresh orange juice.
Sprinkle orange zest on the meat side only.
Pat the skin very dry and cover it with coarse salt.
Place the pork uncovered in the fridge overnight (12 hours) to dry the skin and allow the zest to infuse the meat.
