Place a rack in the center of the oven and preheat the oven to 425 F. Bring almond cream to room temperature. Take crostata dough out of the refrigerator.
On a floured surface, roll out one disk of the dough into a 12 inch circle. Gently wrap the dough around the rolling pin and transfer it to a parchment lined baking sheet.
In a small bowl, whisk the egg white. With a pastry brush, brush the dough with the egg white, leaving a 2 inch border at the outer edge of the dough. Using half of the almond cream recipe, spread a thin layer of the almond cream over the brushed egg white, leaving a 2 inch border from the edge.
Sprinkle the crushed biscotti cookies on top of the almond cream. (the cookies prevent the dough from becoming soggy). Arrange the apple mixture in the center of the dough.
Using the parchment paper lining the cookie sheet, fold the outer edge of the pastry over the inner circle of fruit. Care not to make any holes in the dough where juice could escape. In a small bowl, whisk together egg yolk and heavy cream. Brush the edges of the pastry dough with the egg wash. Sprinkle the fruit center with one tablespoon of sugar.
Bake for 30-35 minutes or until golden and fruit is tender when pierced. Let crostata cool. Garnish with more orange zest and serve with a glass of Prosecco. Cheers!