For the shortcrust pastry, mix together flour, butter, egg yolk, salt and water and knead into a smooth dough. Wrapped in foil, leave to rest in the refrigerator for at least 1 hour.
Roll out the dough thinly and grease either a large tart pan or several small molds and line it with the dough. Pierce several times and distribute the filling on top, place the prawns on top and pour on the cream, just enough to combine all the ingredients of the filling.
Bake at 200 degrees on the middle rack for 20 minutes. They taste best when they are lukewarm. Serve as a main course with a green salad.
The quiche also tastes great with wine or beer as a small snack.