To prepare a turkey tetrazzini, you'll first need to prepare the turkey. To do this, preheat the oven to 450 degrees F (232 degrees C) and prepare your oven rack to the lowest setting. Cut your turkey into 1-inch (2.54-centimeter) thick slices. Place the slices on the foil-lined baking sheet and bake for 20 minutes, or until the skin is crispy and the meat is no longer pink in the center. Serve with your favorite Italian cheeses.