Preheat your oven to 375°F (190°C).

In a large mixing bowl, combine flour and sugar. Add the cold, cubed butter and mix until it resembles coarse crumbs.

Add the egg and salt to the bowl and stir until a dough forms.

Wrap the dough in plastic wrap and refrigerate for at least 15 minutes.

Roll out the dough on a floured surface until it reaches about 1/4 inch in thickness.

Place the rolled dough into a tart pan or pie dish, pressing down gently.

Spread your choice of fruit jam or preserves evenly over the base.

Roll out any leftover dough for strips and create a lattice pattern over the filling if desired.

Bake in your preheated oven for 30-40 minutes or until the crust is golden and the filling is bubbling.

Allow the Crostata to cool slightly before slicing. Serve warm or at room temperature.