Divide the dough into six parts of around 150g (5¼ oz) each.
Roll out each one until it is a rough circle of around 20cm (7¾ oz) in diameter (see note 3).
Equally divide the cheese and onion mixture and place in the middle of one of your pastry circles.
Lightly brush some beaten egg around the circumference and gently pull both sides up together. Crimp and push together with your fingers and turn over the edges on both sides to make sure everything is sealed.
Place on your prepared baking tray and cut one small hole in one of the sides. Repeat with the other pasties.
Bake for around 35-40 minutes. When ready, remove from the oven and allow to cool slightly. Best served warm. Enjoy!