Preparation:
First defrost the seafood cocktail and cook it with the prawns in salted water for approx. 5-10 minutes.
In the meantime, peel the onion and cut into strips. Also wash the peppers and cut into cubes. Cut off the ends of the celery stalks. Cut the celery into thin slices and chop the tender celery greens. Remove the thick stems from the rocket and roughly chop.
Drain the anchovy fillets and cut into fine cubes. Mix with the vinegar, salt and pepper. Gradually mix in the olive oil with a fork to make a creamy sauce.
Drain the seafood cocktail and the prawns in a sieve and leave to cool. Then place in a bowl with the peppers, celery, onion and sauce and mix everything together.
Cover and chill the salad until ready to serve.