Method
Preparing the Tarts
In a mixing bowl, whisk together the all-purpose flour, powdered sugar, and salt.
Add the cold, cubed butter to the mixture and blend until it resembles coarse crumbs.
Stir in the egg yolk and gradually add cold water until the dough holds together.
Form the dough into a ball, flatten, wrap in plastic, and refrigerate for at least 30 minutes.
In another bowl, whisk together the large eggs and granulated sugar until well blended.
Mix in the milk, heavy cream, vanilla extract, and a pinch of salt until smooth.
Preheat your oven to 375°F (190°C).
Roll out the chilled dough to about 1/8 inch thick on a floured surface.
Cut out circles from the rolled dough and press into muffin tins.
Pour the egg custard filling into each pastry shell, filling about 3/4 full.
Place the filled tarts in the oven and bake for 20-25 minutes until custard is set.
Allow the tarts to cool in the pan for a few minutes, then transfer to a wire rack.
Enjoy the tarts warm or at room temperature.
Notes
Dust with powdered sugar before serving for extra sweetness.