Delicious Turkey Gravy - cooking recipe

Ingredients

3 cups water
1 turkey neck (can add giblets too)
1 cup celery (with leaves)
2 carrots, sliced
1 medium onion, sliced
2 garlic cloves, sliced
2 bay leaves
3 parsley sprigs
1 tablespoon fresh thyme
5 peppercorns
4 tablespoons butter (NO SUBSTITUTIONS OR WON'T THICKEN!)
4 tablespoons flour
salt
pepper
1/2 cup pan drippings from turkey

Preparation

In a large saucepan combine 3 cups water, turkey neck (and giblets, if using), celery, carrots, onion, garlic, bay leaves, parsley, thyme and peppercorns. Bring to a boil.
Reduce the heat and simmer for an hour (I simmer all day and sporadically add pan drippings).
Strain and de-fat the broth.
Return broth to pan and heat gently.
Defat the dripping and add to the stock. Simmer uncovered for 10 minutes.
In a small saucepan, melt the butter and add the flour. Stir well and cook until the roux turns a light brown.
Whisk the roux into the stock and cook until the gravy thickens.
Season with salt and pepper.
Serve hot.