Step 1

Preheat the oven to 350°F (180°C)

Step 2

Take the puff pastry out from the freezer to let it thaw a little bit.

Step 3

Meanwhile, whisk egg white, confectioners' sugar, lemon zest, and lemon juice together and set it aside.

Step 4

Place the puff pastry sheet on a cutting board, unfolding it immediately after it has thawed enough that you are able to separate them. Dust off some excess flour on the puff pastry.

Step 5

Use a spatula or the back of a spoon to apply the egg white mixture on the puff pastry sheet.

Step 6

Evenly top the entire puff pastry sheet with almond slices.

Step 7

With a sharp knife, cut the puff pastry sheet into 24 rectangular pieces (or any shape you like!) and place them on a lined baking sheet with some space between each piece.

Step 8

Bake for 18-20 minutes or until it's all puff up and golden brown.

Step 9

Dust with some confectioners' sugar if desired.