Separate the frozen slices of puff pastry and remove the sheets of paper between them.
Coat one side with egg yolk and put the slices back together again so they become a block.
Freeze slightly then cut slices from the block using a ruler and a sharp knife.
Place on a baking mat and brush lightly with egg yolk.
Sprinkle with salt and wild oregano.
Bake in the oven at 200°C for 6 to 8 minutes.
Store in a well-sealed container.
Heat the olive oil and sweat the shallot and sliced artichoke hearts.
Add the remaining ingredients and bring to a boil.
Chop finely with the blender, season with salt, then leave to cool.