Mix salt, garlic, sweet paprika, and hot paprika into a paste. Adjust garlic and spice to taste.
Slice the pork into portions and rub with vinegar first then with the spice paste.
Arrange the meat in a baking dish. Cover with grape leaves (or foil/parchment).
Roast at 150 °C (300 °F) for about 4 hours until tender.
Uncover and brown the top for 15–20 minutes.