Sweet and Spicy Short Rib Tacos

INGREDIENTS

• 1/2 cup chopped fresh cilantro leaves
• 1 tablespoon apple cider vinegar
• * can be found in the Hispanic section of grocery stores
• 1 1/2 cups low-sodium beef broth
• Mexican crema or sour cream
• 1 teaspoon salt, plus extra for seasoning
• 3 garlic cloves, coarsely chopped
• 6 pounds beef short ribs
• 1/3 cup brown sugar
• 1 teaspoon freshly ground black pepper, plus extra for seasoning
• 4 dried ancho chiles*, stemmed, seeded, and ribs discarded
• 1 medium onion, quartered
• Warm corn tortillas
• 1 tablespoon vegetable oil