Classic Thanksgiving Turkey

Name: Classic Thanksgiving Turkey
Ingredients: One 12-pound turkey; Kosher salt and freshly ground black pepper; 1 stick salted butter, at room temperature; 1 lemon, halved; 1 head garlic, halved; 4 to 5 sprigs fresh sage; 3 large carrots, chopped, optional; 2 white onion, cut into quarters, optional; 3 stalks celery, cut into large pieces, optional; 1 apple, roughly chopped, optional; 1 to 2 cups low-sodium chicken stock or water; 2 tablespoons unsalted butter; 3 tablespoons all-purpose flour; 1 tablespoon tamari; 2 teaspoons chardonnay vinegar