Preheat the oven to 180ºC.
Roll out the pastry and line the pastry dish. Trimming off the excess.
Peel the pears and chop them up and put them in a bowl.
Add the juice of half a lemon and stir.
Add the blueberries and pour into the pie dish.
Using the off cuts cut out the stars and place over the fruit.
Whisk up an egg and using a pastry brush, brush the egg over the pastry so it goes a beautiful golden brown.
Sprinkle with the granulated sugar and pop into the oven.
Bake for 20-25 mins until golden brown.
Serve straight away.