1 (4 1/2 to 5 pound) bone-in pork shoulder roast
12 medium cloves garlic, peeled and left whole
1 tablespoon dried powdered oregano
1 teaspoon salt, or to taste
1/2 teaspoon freshly-ground black pepper, or to taste
1/4 cup distilled white vinegar or freshly-squeezed lime juice
2 tablespoons olive oil

Rinse pork shoulder under cold running water. Pat it dry with paper towels. Cut shallow slits with a small sharp knife all over the pork shoulder.

Make an adobo, a garlic-spice rub. Pur