Preheat the oven at 130 degrees Celsius.
Whip the egg whites and salt to a hard foam with an electrical mixer.
While still whipping add the sugar bit by bit.
Cut the pistachios small pieces.
Pour the white wine vinegar, pistachios and corn starch in the bowl and mix gently with a wooden spoon.
Place a baking paper on a baking sheet with approx. 35x 40 cm.
Spread evenly the cake batter on the paper and place in the middle of the oven for 1 hour and 15 minutes.
Turn off and open the oven. Let the cake cool down in the oven.
Before serving the cake whip the whip cream and spread evenly on the cake.
Divide the passion fruits in half. Scoop out with a small spoon and spread it oven the cake.