Preheat the oven to 400 F.
Lightly flour a wooden board, unfold the thawed puff pastry. Lightly roll it with the help of rolling pin just enough to stretch it out.
Once rolled, transfer it to a baking tray lined with parchment paper. Use a sharp knife to score on the edges leaving 1 inch border or edges, this frames the pastry, and this is where we will add our filling.
Using a fork, poke in the center of the puff pastry, leaving the border as it is. This will help the puff pastry not poof up while baking where the filling is added.
Spread the filling evenly in the scored area on puff pastry in between.
Sprinkle some mozzarella cheese.
Place the trimmed asparagus in a single layer and sprinkle some pine nuts. Pine nuts are optional. I love the texture it gives.