Preheat oven to 400℉/200℃/Gas Mark 6.
Slice and stone plums. Put sliced plums into a medium bowl and mix in the sugar, honey, and cinnamon. Let macerate while preparing the other parts of the galette.
Prepare the cream cheese filling. Beat the block of softened cream on medium until smooth.
Add the egg yolk and beat until incorporated.
Add in the sugar, lemon juice, and vanilla extract and mix together. Keep in the fridge until needed.
Roll out the puff pastry and divide the pastry into 8 squares. Approximately 4”x4”.
Spread the cream cheese in the centre of the pastry leaving half an inch empty at the sides of the pastry. Place the plums in the centre of the puff pastry leaving half an inch around the outsides as well.
Fold over the sides of the puff pastry and brush the egg wash over them.
Bake in the oven for 25-30 minutes until the edges are lightly browned.
Remove from the oven and let cool. Top with icing sugar if desired.