Divide the chilled dough into two equal portions, approximately 480 g each. Keep one portion in the refrigerator while working with the other.
On a lightly floured surface, roll out the dough into a large 12x16-inch rectangle.
Spread half of the filling over the top half of the dough and sprinkle the chopped raisins evenly over it.
Fold the bottom half of the dough over the top half to enclose the filling.
Roll the folded dough again into a 12x16-inch rectangle.
Using a pizza cutter or a sharp knife, cut the dough into 12 strips, each about 1 inch wide.
Roll each strip into a loose snail shape, careful not to roll too tightly.
Place the rolled pastries on a parchment-lined baking sheet, arranging them in rows of three with two staggered between the gaps. Do not place them too close to each other.
Repeat the process with the second portion of the dough.
Brush the pastries with egg wash using a pastry brush. Let them rise for 90 minutes before baking.