Crumble the speculoos finely and mix with melted butter. Drain the cherries and lingonberries, collect the juice. Pour the speculoos mixture into a 26-piece springform pan, let it cool and then distribute the drained fruit on top.
Make a topping out of the juice and the red cake topping and pour onto the fruit. Put in a cool place!
Whip the cream with vanilla sugar and cream stiffener and pour over it or spray on with the piping bag. Chill for a few hours. Then decorate with the rest of the speculoos - not before, because then they soften!