2 Tablespoons butter (for melting)
Preheat oven to 400º F.
Brush six ramekins with melted butter at room temperature
and coat with sugar.
Bring water, lime juice, vanilla bean and sugar to a boil.
Whisk egg whites with an electric mixer until soft peaks form.
Add in sugar liquid. Whisk again with a warm whisk until stiff
peaks form. Gently fold in passion fruit purée with a spatula.
Fill ramekins with the mixture and bake for 7 minutes.
Remove carefully from oven and serve immediately.