When this fat is quickly heated, the water within it evaporates ... it to the pastry. Adding hot filling to a cold puff ...

Hot water pastry is fun to make — warm, pliable and easy to work with. It's what you'll find in the traditional English Melton Mowbray pork pie, which is baked without a supporting tin.

For the hot water pastry, put the two flours into a bowl with ... using a palette knife. As soon as the dough is cool enough to handle, get your hands in and bring it all together.