Ingredient:

• 1 tablespoon olive oil
• 1 medium onion, chopped
• 2 garlic cloves, minced
• 4 cups chicken broth
• 2 cups water
• 1 smoked turkey leg
• 1 teaspoon salt
• 1/2 teaspoon pepper
• 1/4 teaspoon crushed red pepper flakes
• 1 pound collard greens
• 1 tablespoon cider vinegar
• Dash hot pepper sauce