Preheat the oven to 200 degrees and line a baking tray with baking paper
Remove the pastry from the freezer 10 minutes before filling. If using the pastry from the fridge, use immediately or the pastry will get too difficult to handle/fold and cut
Roll the pastry sheet out flat over the plastic sheet of the pastry packaging to ensure it does not stick to the bench. Alternatively place down a sheet of baking paper or flour your benchtop well. Cover the pastry with the pesto - leaving 1cm gap lengthways on the left hand side. Sprinkle the cheese evenly over the top and top with the quartered cherry tomatoes
Tightly roll up the pastry sheet into a log and slice the pastries to make them roughly 1.5 in width
Separate each pastry and place them down flat on the baking tray
Whisk the egg and using a pastry brush, brush the pastry with the egg wash
Place the pastries into the hot oven to bake for 10 minutes on 200 degrees. Then decrease the heat to 180 degrees and bake for roughly another 25 minutes until the pastry is golden