Most delicious of summer fruit... and also exceedingly good for you, both czereśnie and wiśnie! Sweet cherries are called czereśnie in Poland (and we usually call the yellow variety "white"). We've had a very long season this year, but alas because of the high temperatures and unsettled weather it is coming to an end all too early. Agnieszka Bielawska and Elżbieta Krajewska consider.