Maple Roast Turkey and Gravy

INGREDIENTS

• 2 cups apple cider
• 1/3 cup real maple syrup
• 2 tablespoons chopped fresh thyme
• 2 tablespoons chopped fresh marjoram
• 2 1/2 teaspoons grated lemon zest
• 3/4 cup butter
• salt and ground black pepper to taste
• 14 pounds whole turkey, neck and giblets reserved
• 2 cups chopped onion
• 1 cup chopped celery
• 1 cup coarsely chopped carrots
• 2 cups chicken stock
• 3 tablespoons all-purpose flour
• 1 teaspoon chopped fresh thyme
• 1 bay leaf
• 2 tablespoons apple brandy (optional)