1Roll out puff pastry sheets and place them on a lightly floured surface

Cut the pastry sheets into four different pieces and place parchment paper between each slice

Melt the butter and mix it with flour and salt until smooth and cook for 1-2 minute

Add in warm milk and continue stirring until boiling

Add in spinach until wilted

Add in ham and cheese and mix

Once cooked, set this roux to the side

Place puff pastry on parchment paper and fill with the roux mixture

Fold the sides of the pastry into the center

Brush egg wash on the outside of the pastry and bake for 20 minutes