Carne Adovada

Ingredients

• 24 dried red New Mexico chiles, seeded, rinsed, and cut into (1-inch) pieces
• Cooking spray
• 1 1/2 cups chopped onion
• 1 tablespoon cider vinegar
• 2 teaspoons dried oregano
• 1 1/2 teaspoons salt
• 3 garlic cloves, minced
• 1 (14-ounce) can fat-free, less-sodium chicken broth
• 1 (3-pound) boneless pork shoulder (Boston butt), trimmed and cut into 1 1/2-inch cubes