Preheat oven to 180°C
Cut the puff pastry into 6 even rectangles and separate on a lined baking sheet.
Cook for 15 minutes until risen and golden brown. Allow the puff pastry to cool completely.
Meanwhile, combine the cream cheese, thickened cream and icing sugar in the bowl of a mixer until smooth and thick. Set aside
Slice each cooled puff pastry rectangle horizontally with a sharp knife (you will see the puff pastry naturally has a seam running around it).
Place the first layer of puff down, spread a generous amount of cheesecake mixture over and then top with sliced strawberries. Place another layer of puff down and repeat this process again.
Keep going until you have 4 Napoleons with 3 layers.
Melt the chocolate in the microwave, and then drizzle over the top of each dessert.