01 -
In a medium saucepan, combine cranberries, sugar, water, and salt. Bring to a boil over medium-high heat, stirring occasionally. Reduce to a gentle simmer, cover, and cook until cranberries burst and break down, about 10 minutes.
02 -
While cranberries cook, whisk egg yolks and cornstarch in a bowl until smooth. Reserve egg whites for the topping.
03 -
Carefully transfer the hot cranberry mixture to a high-speed blender or food processor. Add the yolk mixture immediately and blend until completely smooth, approximately 1 minute, scraping down sides as needed.
04 -
Allow the curd to cool in the blender or processor bowl until a skin forms and the temperature registers 49–52°C. This may take 45 minutes to 1 hour. Meanwhile, prepare the crust.
05 -
Preheat oven to 175°C. Line an 20 cm square baking pan with two sheets of parchment laid perpendicular with overhang for easy removal.
06 -
In a bowl, whisk together flour, sugar, and salt. Pour in melted butter and stir until a uniform dough forms.
07 -
Press dough evenly into prepared pan. Bake on the middle rack until golden brown, 20 to 25 minutes. Allow crust to cool for 20 minutes before adding curd.
08 -
Add softened butter to the slightly cooled cranberry purée and blend until smoothly incorporated, about 30 seconds.
09 -
Pour the mixture through a fine-mesh strainer set over a bowl, pressing with a rubber spatula to extract as much curd as possible.
10 -
Spread the strained cranberry curd evenly over the cooled crust. Let stand at room temperature for 2 hours, then cover and refrigerate for at least 2 hours.
11 -
In the bowl of a stand mixer fitted with a whisk attachment or with a hand mixer, beat egg white until foamy, about 2 minutes. Add sugar and salt; beat until stiff peaks form, about 5 minutes.
12 -
Transfer meringue to a piping bag fitted with a decorative tip. Shortly before serving, pipe dollops of meringue onto each bar.
13 -
Using a sharp chef’s knife, cut chilled bars into 8 portions. Garnish with lemon zest and thin slices of fresh cranberry. Toast meringue with a kitchen torch if desired. Serve chilled.