How to make
In a bowl, pour the flour, softened butter, egg, sugar and baking powder. Stir with a fork and knead a dough. Set aside a small ball of it for the strips.
Roll out the rest of the dough into a sheet 9 1/2″ (24 cm) in diameter. Lay it out into a round tray, while also forming a border.
Poke holes in it with a fork and smear with a thick layer of the jam. Use the set aside ball of dough to cut out strips, arrange them on top.
Arrange in a criss-cross pattern. Bake the crostata at 360°F (180 °C) for about 25 min.