Roll out the chilled pastry to 4mm thick. Cut circles from the pastry using a tea plate or side plate as a guide. You can make them any size you want but you may as well have something you can get your teeth into! My tea plates measure 19cm across so if you use this size you will get 6 large pasties from this amount of pastry.
Divide the filling into 6 equal portions. These should be roughly about 200 grams each.
Pile a portion of the filling onto the centre of one of the circles of pastry.
Brush the beaten egg around the edge of half of the circle of pastry then bring the other half over the filling to enclose it and seal the edges together.
Press the edges together firmly then crimp the edges in the classic rope style to seal everything inside.
Glaze with the egg wash and put onto a baking sheet lined with parchment paper.
Do the same with the other circles of pastry - you may need 2 baking sheets.
Bake the pasties in the centre of a preheated warm oven - Gas 4 / 180°C / 350°F/ Fan 160°C Fan for 1 hour or until nicely golden brown.
When cooked, place onto a wire rack to cool before devouring still slightly warm - delicious!