Layout the pastry sheets to receive the filling
On each sheet, put a layer of potatoes down the centre, leaving a little space at the sides of the sheet. Lightly sprinkle with salt and pepper.
Next add a layer of swede, onions and finally the beef, adding a light sprinkling of salt and pepper between each layer.
Sprinkle a little flour over the filling.
Wet the tips of your fingers and lightly moisten the edges of the puff pastry sheet. Bring the sides up and seal the pastie. Turn the pastie onto its side and crimp the edges in traditional Cornish fashion
Assemble the remaining pasties and lay them on a lined baking sheet. Use a sharp knife to cut a slit in the center of each pastie. Lightly brush each pastie with the beaten egg mixture.
Bake in a hot oven on the middle rack for 40-50 minutes until golden in colour. Remove from the oven and let them sit for about 10 minutes (they will be very hot inside) before eating.