New Leaf - Roasted Turkey And Gravy

Ingredients

• 14-16 pound turkey, legs tied and giblets removed
• 1 rinsed celery stalk, thinly sliced
• 1 rinsed carrot, thinly sliced
• 1 onion, peeled and thinly sliced
• 6 cloves garlic
• 8 sprigs washed thyme
• 2 sprigs washed rosemary
• Kosher salt & black pepper
• 4 cups water
• 4 1/2 cups turkey stock (or chicken stock)
• 1/4 cup plus 2 tablespoons all-purpose flour