Step 1

Preheat the oven to 400 degrees F (200 degrees C). Lightly grease the bottom of a deep-dish pie plate.

Step 2

Beat butter, sugar, and egg in a bowl until creamy. Blend in flour to form a dough, using your hands to knead it together at the end.

Step 3

Roll pastry out on a lightly floured surface and place into the prepared pie plate so it covers the bottom and the sides.

Step 4

Beat eggs and sugar in a bowl using an electric mixer. Beat in vanilla extract. Gradually stir in cold milk until fully incorporated. Pour custard mixture over the pastry base and sprinkle with nutmeg.

Step 5

Bake in the preheated oven until custard is set and a sharp knife inserted near the centre comes out clean, about 45 minutes. Remove from the oven and cool completely before serving, about 1 hour.