The Best Turkey Gravy Recipe

Name: The Best Turkey Gravy Recipe
Ingredients: Turkey neck, gizzards, and trimmings; 1 tablespoon (15ml) vegetable oil; 1 large onion, roughly chopped; 1 large carrot, peeled and roughly chopped; 2 ribs celery, roughly chopped; 1 1/2 quarts (about 1.5L) homemade or store-bought low-sodium chicken stock, plus more as needed; 1 teaspoon (5ml) soy sauce; 1/4 teaspoon Marmite; A few sprigs mixed herbs, such as fresh parsley, thyme, or rosemary; 2 bay leaves; 3 tablespoons (45g) butter; 1/4 cup (1 1/2 ounces) flour; Kosher salt and freshly ground black pepper