Heat oven to 400F. Line a baking sheet with parchment paper.
Unfold the puff pastry sheet over the parchment paper. Using a rolling pin, carefully roll out the dough to a 10x10 square.
Cut the puff pastry sheet in half on both sides, leaving you with 4 5x5 squares.
Slice ¼ inch thick slices of the guava paste. Trim the slice of guava paste to 3 inches long to make them perfect fit the pastry.
Place a piece of guava paste diagonally and off center of each sqaure.
Slice ¼ inch strips of cream cheese and place over the guava
Brush the edges of the pastry with water.
Carefully fold the pastry square in order to create the traditional triangle shape.
Crack an egg into a small bowl and whisk it until well combined and then brush the tops of the puff pastries with the egg.
Bake at 420F for about 20 minutes or until golden brown and puffed up.
While the pastries are baking, make your simple syrup by adding 3 tablespoon of water with 3 tablespoons of white sugar to a cup and microwaving for 1 minute or until the sugar is fully dissolved.
Once out of the oven, brush the top with simple syrup and allow to cool.
Allow the pastries to cool off and then carefully rip them apart, use a knife if needed.