Instructions

1. 1
   Wash the pork shoulder.
2. 2
   Skin side down, use a sharp knife to make incisions in different places of the pork shoulder.
3. 3
   Grind together the garlic, pepper, oregano, and salt
4. 4
   When done grinding, mix in oil and vinegar.
5. 5
   Fill the incisions of the pork with the ground mixture. Whatever is left over rub on the outside of the pork.
6. 6
   Put away in the refrigerator for 3 days. If you planned to cook it the same day, prepare the pork at least 1 hour ahead of time.
7. 7
   Remove the pork shoulder from the refrigerator 2 hours before putting it in the oven.
8. 8
   Preheat the oven at 350ºF (180°C) for at least 10 minutes before you begin cooking the pork shoulder.
9. 9
   Cook the pork for 3½ hours.
10. 10
    Raise the temperature to 375°F (195°C) and cook for 15–30 minutes until the skin is toasted and browned.