Giblet Gravy

Bahan-bahan (8 porsi)

• giblets (from one turkey (including neck, liver, gizzard, heart))
• ½ onion (quartered)
• 2 ribs celery (cut into 2-inch pieces)
• 1 bay leaf
• 4 cups turkey drippings (or stock, broth, or a combination)
• 2 tablespoons chopped fresh herbs (2 teaspoons dry, *see notes)
• ½ teaspoon poultry seasoning
• salt and black pepper (to taste)
• 4 tablespoons butter
• 4 tablespoons all-purpose flour
• 1 cup cold water (or cold broth)