Fillet is formed of slices that are lightly crushed. Sprinkle with salt, pepper and lemon juice. Onions, mushrooms and walnuts are smothered in the butter. Finally add the parsley. Stew mixture, slightly cooled is allocated to fuck cutlets, roll to roll and pinned onto a toothpick. Spread sunflower oil and bake BBQ. Serve on lettuce leaves and lemon slices.