For the pasta salad, boil the croissants in salted water until al dente, strain and let cool. Hard boil the eggs, rinse and let cool. Cut the cheese and the cucumber into small pieces. Slice the tomatoes and then cut them into pieces as well.
Wash and drain the corn. Cut the eggs into slices. Mix all the ingredients together well except for 2 eggs.
For the dressing of the pasta salad, mix sour cream with mustard, mayonnaise and the spices and mix well with the other ingredients.
Put the remaining 2 eggs on top of the pasta salad and chill it in the icebox for a while, so that the pasta salad can be well done.