01 - In a small bowl, sprinkle powdered gelatin over cold water and let sit for 5 minutes until softened.
02 - In a saucepan over low heat, combine passion fruit pulp and sugar. Stir constantly until sugar dissolves and mixture becomes warm, taking care not to boil.
03 - Remove saucepan from heat and stir the bloomed gelatin into the warm passion fruit mixture until completely dissolved. Allow to cool to room temperature.
04 - In a clean bowl, beat egg whites using an electric mixer until stiff peaks form.
05 - In another bowl, whip 1 cup cold heavy cream until soft peaks form.
06 - Gently fold the cooled passion fruit mixture into the whipped cream using a rubber spatula. Then fold in the beaten egg whites until fully incorporated and smooth.
07 - Divide mousse into serving glasses or bowls and refrigerate for at least 2 hours until set.
08 - Before serving, whip the remaining 1 cup cold heavy cream with powdered sugar until soft peaks form.
09 - Spoon or pipe whipped cream topping onto chilled mousse. Garnish with fresh passion fruit pulp, seeds, and mint leaves if desired. Serve immediately.