Remove 1 disk of dough from the fridge and sprinkle the dough with flour and roll out the dough between 2 sheets of wax or parchment paper. Approximately 11 inches round. (You'll want it wide enough to cover the bottom and up the sides of your pan.)
Line the greased baking tin with the pastry dough, while pressing together any pieces of dough that come apart.
Pierce the tin-lined dough with a fork all around and spread it with the jam.
Pour the amaretto liquor into a small bowl.
Quickly dip the amaretto cookies in the liquor while turning to coat both sides.
Starting at the outer edge, circularly layer the amaretti cookies over the jam.
Roll out the remaining dough between 2 sheets of wax or parchment paper into approximately an 11-inch circle.
Peel off the top sheet of parchment paper and gently invert the dough while aligning yourself with the edge of the tart tin, over the amaretti-topped tart and peel off the remaining parchment paper.
Slightly and gently press down around the amaretti cookies and the edges of the tart and cut off any excess dough.
Bake the crostata in a preheated oven at 350 degrees F, for about 30 to 35 minutes. Or until golden brown in colour.
Transfer to a wire rack and allow to cool for about 30 minutes.
Release the tart from the baking tin and return the crostata to the wire rack to cool completely.
Dust with powdered sugar just before serving.
The crostata will keep well in an air-tight container for up to 3-4 days.