Super simple custard tarts, very easy to make using frozen puff pastry. Don't be fooled by the simplicity of the recipe, these are addictive!
Preheat oven to 190 degrees C. Lightly grease a 12-cup muffin tin and line bottom and sides of cups with puff pastry.
In a saucepan, combine milk, cornflour, sugar and vanilla. Cook, stirring constantly, until mixture thickens. Place egg yolks in a medium bowl. Slowly whisk half of the hot milk mixture into the egg yolks. Gradually add egg yolk mixture back to remaining milk mixture, whisking constantly. Cook, stirring constantly, for 5 minutes, or until thickened. Remove vanilla bean.
Fill pastry-lined muffin tin with egg mixture and bake for 20 minutes, or until pastry is golden brown and filling is lightly browned on top.