This tart pairs a buttery shortcrust shell with a hibiscus-infused curd and a passion fruit topping, balancing floral and tangy flavors in each slice. Plan for about 90 minutes total, including chilling time, to let the curd set properly before serving.
In a mixing bowl, combine 1 1/2 cups all-purpose flour, 1/4 cup sugar, and a pinch of salt.
Add 1/2 cup cold, cubed unsalted butter, using a pastry cutter or your fingers to blend until the mixture resembles coarse crumbs.
Stir in 1 egg yolk and 2 tablespoons ice water. Mix until the dough just comes together.
Press the dough evenly into a 9-inch tart pan. Chill in the refrigerator for at least 30 minutes.
For the Filling:
In a saucepan over medium heat, whisk together 1 cup hibiscus tea, 1/2 cup sugar, and 2 tablespoons cornstarch until well combined.
Add 1/4 cup passion fruit puree and 2 tablespoons fresh lime juice, stirring constantly until the mixture thickens and comes to a boil. Let it boil for one minute, then remove from heat.
Strain the mixture through a fine-mesh strainer to remove any lumps and let it cool slightly.
Assembling the Tart:
Preheat the oven to 350°F (175°C).
Pour the hibiscus filling into the chilled tart crust.
Bake for 25-30 minutes or until the filling is set but still slightly jiggly in the center.
Cool completely on a wire rack.
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Notes
For a twist, consider adding a sprinkle of edible dried hibiscus petals for a delightful crunch and visual appeal.
If fresh passion fruit is unavailable, a top-quality store-bought passion fruit puree can be used.