To make the almond cream, mix al the ingredients in a bowl with a rubber spatula until smooth, place in the fridge until needed. You can do this step the night before and store the filling in an air tight container.
Unroll the puff pastry sheet and cut a 20 cm size circle with a sharp knife, transfer to a baking paper and place in the fridge.
Now cut a 22cm size circle with a shape knife, transfer to a baking paper and place in the fridge.
To make the glaze, beat the egg yolk and cream until smooth, set aside.
Place the smaller sheet on a baking tray and fill it with the almond cream, leaving a 2 cm border around the edge of the dough. Smooth out the top.
Egg wash the edge and cover with the larger puff pastry dough, using your fingers seal the two pieces of dough together well and transfer to the fridge for 30 minutes or until it is firm to the touch.
Egg wash the top generously and crimp the edges of the galette with the back of a knife. Make an incision in the center of the top layer and gently score the top.
Transfer to the fridge and let it chill for 15 mins. In the mean time preheat the oven to 180℃.
Bake the galette for 45-50 minutes until it has puffed up, golden and dry to the touch. Let it cool down for 10 minutes before dusting with icing sugar, slicing and eating.