For the vinaigrette, peel and finely dice the onion. Mix vinegar, salt, pepper and sugar. Fold in olive oil. Add onion. Wash the meat, dab dry. Heat the oil in a frying pan and fry the meat in it over medium heat for 5-6 minutes on each side.
Season with salt and pepper and take out, let it rest for a short time. Meanwhile clean and wash the rocket and let it drain well in a sieve. ##Clean, wash and cut the rocket salad into strips.
Wash basil, shake dry, pluck leaves from the stalks. Wash and halve the tomatoes. ##Clean and clean the mushrooms and cut them into thin slices. Mix rocket, romaine lettuce, tomatoes, mushrooms, olives, basil and vinaigrette well.
Cut the meat open. Arrange salad and chicken meat in small bowls. Serve with ##Ciabatta##.