Simmer 1 cup of passion fruit pulp with 2 cups of water until reduced by a little more than half, about 15 minutes. Strain, pressing the seeds to extract the juice.
Blend the juice with 3 tablespoons of lime juice, 1 cup of pisco, and ½ cup of simple syrup for 30 seconds.
Add 2 egg whites and 6 ice cubes and blend for no more than 30 seconds. Pour into chilled short glasses.
