Flaky pastry shells filled with creamy egg custard make a beloved dim sum dessert. These golden tarts are a sweet finish to any family dim sum feast.
Preheat your oven to 375°F (190°C) and set the rack in the center position.
On a lightly floured surface, roll out the puff pastry sheets to 1/8-inch thickness, then cut into 12 rounds fitting a standard muffin tin.
Press pastry rounds into the muffin tin cups, gently molding them up the sides for even thickness; chill in the fridge while making the custard.
In a mixing bowl, whisk eggs and sugar together thoroughly until pale; add milk, vanilla extract, and salt, mixing gently to avoid bubbles.
Strain the custard mixture to ensure a smooth texture, then carefully pour into the chilled pastry shells, filling them about 80% full.
Bake for 22–25 minutes, just until the custard is set but still jiggles slightly in the center and pastry is golden; do not overbake to prevent cracks.
Cool in the tin for 5 minutes, then remove tarts to a rack. Serve warm or at room temperature for best texture.