For the sauce, slice about 1/3 of the Parmesan cheese into chips. Grate the rest of the Parmesan. Peel garlic and chop finely. Mayonnaise, sour cream, vinegar, Worcester sauce. Mix garlic and grated Parmesan.
Season to taste with salt and pepper.
Wash the meat and dab dry. Heat oil in a pan. Fry the meat for 5-6 minutes on each side. Season with salt and pepper and remove.
Cut open the buns. Toast the halves of the rolls or roast them crispy in a preheated oven (electric cooker: 200°C/circulating air: 175°C/gas: level 3). Clean and wash the salad and drain well. Pluck large leaves smaller.
Cut the meat diagonally into thin slices. Spread the lower halves of the rolls with some sauce. Lay salad leaves and meat slices alternately on top. Drizzle some sauce in between and sprinkle with Parmesan shavings.
Cover with the top halves of the buns.