Line two large rimmed pans with parchment paper and preheat your oven to 400F (200C).
Roll of piece of the chilled dough over a clean surface lightly dusted with flour, into a 1/4-inch thickness.
Use a sharp knife, and use a large cake pan (12-inch), or a pan lid to slice trip the dough.
Spread 3-4 tablespoons of the jam and sprinkle the chopped nut, or crushed cookies.
Use a pizza cutter (or a sharp knife) to slice the dough into 12-16 wedges.
Roll each wedge into a crescent starting from the wide end.
Place the cookies over the prepared baking pan, and do the same with the second part of the dough.
Brush with the egg yolks, sprinkle with the sugar and bake over the middle oven shelf for 15-17 minutes.
Remove from the oven and allow the cookies to chill for 10 minutes before inverting them to a wire rack.