Peel and finely chop the garlic. Mix mayonnaise, sour cream, milk and garlic. Season to taste with salt and pepper. Wash and drain the salad. Wash and slice the tomatoes. Peel onion and cut into thin rings.
Cut open the buns. Heat 2 tablespoons of oil one after the other in a large frying pan. Fry the bread roll halves in portions with the cut surfaces facing down and remove. Fry the salami in portions in the hot pan until crispy and remove.
Dab schnitzel dry. Heat 2 tablespoons of oil in a frying pan. Fry the escalopes on both sides for about 2 minutes. Season with salt and pepper and remove. Fry the tomatoes in the pan briefly while turning.
Season with salt and pepper.
Place the cutlets on a baking tray lined with baking paper. Spread tomatoes and cheese on top. Bake in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) for 6-8 minutes.
Spread a little garlic cream on all bread roll halves. Cover lower halves with salad, gratinated cutlet, onions and salami. Place the lid on top and serve. Drink tip: lemonade.