For the Italian zucchini, soak the zucchini slices in boiling salted water for about 5 minutes, then drain and cool. Mix the flour with Parmesan, salt and pepper and turn the zucchini slices in it.
Heat the oil in a frying pan and fry the zucchini over medium heat until golden brown all over. Drain a little on kitchen roll.
Melt the butter in the pan and sauté the onion until soft and translucent. Then add the tomatoes and saute for 2 minutes. Place the Italian zucchini in a serving bowl and mix with the onion-tomato mixture.