Leftover Turkey Pot Pie

Bahan-bahan (6 porsi)

• ¼ cup butter
• 1 small yellow onion, chopped small, about 1 cup
• ½ cup celery, sliced very thin, about 2 stalks
• ⅓ cup all-purpose flour
• 1½ cups chicken broth
• 1 cup milk
• ½ teaspoon kosher salt
• ¼ teaspoon black pepper
• ¼ teaspoon celery seed
• 4 cups cooked turkey, diced into ½-inch pieces ((chicken may be substituted))
• 2 cups frozen mixed vegetables
• 2 unbaked pie crusts, store-bought or homemade