Prep the pastry
Preheat the oven to gas 6, 200°C, fan 180°C. Unroll the puff pastry sheet onto a large baking tray lined with baking paper. Using a sharp knife, score a border of 2cm around the outer edge, cutting through half the depth of the pastry. Use a fork to prick all over the centre of the pastry. Transfer to the oven to bake for 10 mins until puffed and a light golden brown.