01 - Sprinkle powdered gelatin over cold water in a small bowl; allow to bloom for 5 minutes.
02 - Combine passion fruit pulp and granulated sugar in a saucepan over low heat. Stir continuously until the sugar is fully dissolved and the mixture is warm, ensuring it does not boil.
03 - Remove the saucepan from heat and stir in the bloomed gelatin until it is completely dissolved. Allow the mixture to cool to room temperature.
04 - In a separate, clean bowl, beat the large egg whites until stiff peaks are formed.
05 - In a third bowl, whip 1 cup of cold heavy cream until soft peaks are achieved.
06 - Gently fold the cooled passion fruit mixture into the whipped heavy cream. Subsequently, carefully fold in the beaten egg whites until all components are smoothly and fully incorporated.
07 - Evenly divide the prepared mousse among individual serving glasses or bowls. Refrigerate for a minimum of 2 hours, or until thoroughly set.
08 - Just before serving, whip the remaining 1 cup of cold heavy cream with powdered sugar until soft peaks form. Spoon or pipe this whipped cream onto the chilled mousse.
09 - Garnish each serving with fresh passion fruit pulp or seeds and a sprig of fresh mint leaves, if desired. Serve immediately for optimal freshness.