01 -
Cut butter into small cubes. Combine flour, sugar, and butter in a mixing bowl, and beat with an electric whisk until the mixture resembles crumbs. Whisk in the egg yolk, then knead the mixture until a smooth dough forms.
02 -
Preheat the oven to 210°C (410°F). Take a small portion of dough and press it evenly into a 2.6-inch tart mold. Trim excess dough from the edges and prick the bottom with a fork. Repeat for the remaining eight tart shells.
03 -
Bake the tart shells for 15 minutes. Let them cool completely before removing from the molds.
04 -
Soften cream cheese at room temperature and mix with sugar in a bowl until smooth. Gradually mix in heavy whipping cream in three portions, stirring after each addition. Add cornstarch and mix until smooth.
05 -
Transfer the cream cheese mixture to a piping bag and pipe it into the tart shells. Freeze for 4 hours, or until firm.
06 -
Preheat the oven to 210°C (410°F). Whisk 1/2 tablespoon of milk with 1 egg yolk to prepare the egg wash. Brush the frozen cheese tarts with the egg wash and bake for 15 minutes.