Remove skin from bananas and cut into thin slices. Put them in a large enough bowl. Mix juice of one lemon and sugar. Pour over the bananas. Cover and let stand for 10 minutes.
Remove skin from kiwi, halve and cut into slices. Chop walnuts and add. Mix with bananas.
Divide fruit evenly into four cups. Whip the cream with vanilla sugar until stiff. Fill into a piping bag. Garnish fruit cups with it, cherries and extracted pistachios Cold to the table.