Preheat the oven to 190°C.
Mix the powdered sugar finely and spread it on a baking sheet lined with parchment paper.
Bake for 5 minutes, then allow it to cool.
Lower the oven to 120°C and prepare another baking sheet with parchment paper, drawing a 20 cm diameter circle.
Separate the egg whites from the yolks.
Whip the whites until frothy, gradually adding the cooled sugar until the mixture is thick and shiny.
Mix vinegar and cornstarch together, then fold into the meringue.
Place the meringue in the center of the drawn circle on the parchment, smoothing it out and slightly hollowing the top.
Bake for 1 hour and 45 minutes at 110°C.
Allow it to cool in the oven for 2 hours with the door closed to maintain its shape and texture.
Whip the chilled cream until soft peaks form.
Add the icing sugar and vanilla, blending until combined.
Place the cooled meringue on a platter, top with whipped cream, and decorate with the assorted fruits.
Serve immediately for best texture.