Wash, clean and halve the tomatoes. Clean, wash and drain the rocket. Place slices of bread on a baking tray of the oven and roast in the preheated oven (electric cooker: 200 °C/ circulating air: 175 °C/ gas: level 3) for approx. 8 minutes until golden brown, turn once after 4 minutes.
Cut bread into quarters. Rub mushrooms with kitchen paper. Heat oil in a pan. Fry the mushrooms for 5 minutes. Season with salt and pepper. Peel garlic and chop finely. Mix yoghurt and mayonnaise.
Stir in garlic and parmesan. Season to taste with salt and pepper. Mix tomatoes, rocket, mushrooms and bread quarters. Arrange salad on plates and add some sauce. Add the rest of the sauce extra.