Blueberry Pie Squares from Spelt Flour

Preheat the oven to 170 °C and line a baking tray or dish of approx. 15 cm × 20 cm with baking paper.

Prepare the dough: combine the flour (300 g), butter, egg, and sugar until crumbly. Press two-thirds of the dough into the bottom of the baking tray.

Halve the greengage plums, pit them, and place them in a bowl. Add the sugar and wine, then mix well. Let them marinate in the refrigerator for at least 30 minutes.