Wrap the potatoes in aluminium foil and bake in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 20 minutes. In the meantime, wash the cutlets, dab dry and cut into thin strips.
Season with salt, pepper and gyros spice. Peel onion and cut into fine strips. Cut olives into slices. Heat the oil in a pan and stir-fry the gyros in it for 3-4 minutes.
Wash parsley, dab dry, except for a little to garnish, pluck and cut into fine strips. Remove the baked potatoes from the oven, cut them, press them on, add sour cream and sprinkle with parsley.
Arrange on plates with gyros, onion and olives. Ketchup tastes good with it. Garnish with salad and remaining parsley.