Preheat oven (electric cooker: 250 °C/circulating air: 225 °C/gas: see manufacturer). Wash cutlets, dab dry. Heat oil. Fry the escalopes for 2-3 minutes on each side. Wash the tomatoes. Cut tomatoes and mozzarella into slices.
Cut the bread in half horizontally and crosswise. Place on a baking tray covered with baking paper. Spread with pesto, up to 2 tsp. Place the schnitzel, tomatoes and mozzarella on top. Season with salt and pepper. Sprinkle with 2 tsp pesto.
Bake in the oven for about 5 minutes.