Cut the stalks of the celery into approx. 2 cm thick slices and blanch them in salted water, they should stay firm to the bite. In the meantime, cut the fresh pineapple into 2 cm cubes and finely chop the onion. Let the drained celery pieces cool slightly and mix with the pineapple and onions. Salt, pepper and mix with vinegar and oil. Mix in the pink pepper berries and finely chopped tender celery leaves for decoration and a spicy taste. Instead of fresh pineapple, a small tin of pineapple (in pieces) can be used as an alternative.