Slow-Roasted Aromatic Shoulder of Pork

INGREDIENTS

• 6 garlic cloves
• 4 tablespoons sherry or rice vinegar
• 1/2-inch piece fresh ginger
• 1 pork shoulder, skin scored (approximately 12 to 14 pounds)
• 2 fresh red chiles or 1 teaspoon dried red pepper flakes
• 3 tablespoons olive oil (not extra-virgin)