
Start by cutting the puff pastry into four equal parts.
Next, on each part, add one slice of mozzarella cheese and set aside.
In a medium bowl, add the tuna, the cream cheese and parsley to taste.
Season with the salt, the black pepper and mix.
Add this mixture onto the pastry with the cheese and spread it.
Then, fold the pastries by shaping the edges, forming a little basket.
Add 25g of grated mozzarella cheese to each of them.
Place them on a large baking sheet and brush a beaten egg over the pastry.
Take to a preheated oven at 180 ° C (350 ° F) and bake for 30 minutes.
Serve.