Prepare your egg wash. Beat the egg yolk with a drop of water.
On each square, brush some of the egg wash. Sprinkle some sugar. Make tiny holes on dough with a fork to prevent the dough from rising and place in the oven for 15 mns or so (check regularly, the time might vary). Take out and let cool down.
Place the mascarpone preparation in a decoration bag. On one piece of pastry, place some cream, place another square of pastry. Sprinkle with confectioner sugar. Add more cream and a raspberry. Add a twig of basil.
Repeat for as many "amuse-bouches" finger food as you need.