01 -
In a medium saucepan, whisk eggs and sugar together for about a minute until light and glossy. Incorporate lemon juice, zest, and salt. Heat over medium-low heat, whisking constantly for 3-4 minutes until mixture begins to thicken slightly.
02 -
Whisk in butter one tablespoon at a time until completely melted. Continue whisking for 5-6 minutes until mixture thickens enough to coat the back of a spoon. Stir in vanilla extract.
03 -
Strain curd through a fine mesh strainer into a storage container. Press plastic wrap directly onto the surface to prevent a skin from forming. Cover with an airtight lid and refrigerate for 2 hours until completely cooled.
04 -
Combine sugar, lemon juice, water, and zest in a small saucepan. Cook over medium heat until mixture boils and sugar completely dissolves, about 4 minutes. Remove from heat and cool completely.
05 -
Whip heavy cream to soft peaks. Gradually add sugar and continue whipping until stiff peaks form.
06 -
Combine mascarpone cheese with ½ cup of the prepared lemon curd until smooth. Fold in the whipped cream, vanilla extract, and lemon zest until well incorporated.
07 -
Quickly dip half of the ladyfinger cookies in the cooled syrup until fully coated. Arrange in a single layer on the bottom of a 4-quart baking dish, cutting cookies as needed to fill gaps.
08 -
Spread half of the cream mixture over the ladyfingers and smooth evenly. Top with ½-⅔ cup of lemon curd and spread into an even layer.
09 -
Dip remaining ladyfingers in syrup and arrange over the cream layer. Spread remaining cream mixture over cookies and smooth surface. Top with another ½-⅔ cup of lemon curd.
10 -
Refrigerate tiramisu for at least 2 hours before serving. Garnish with fresh or candied lemon slices and mint leaves if desired.