Cook the spinach, squeeze the moisture out and chop
Combine the spinach with the minced turkey, walnuts, egg and season with salt and pepper
Preheat the oven to 400°F (200°C)
Gently pound the turkey breast slices to flatten them and spread them with the spinach mixture
Put the cheese slices over the mixture, roll the turkey slices up and tie them up with the string
Oil a baking dish, put the rolled up turkey inside and roast for 10 minutes
Take them out of the oven, turn them over and add the white wine
Return to the oven and cook until the wine has evaporated.