Crumb Pie with Jam

Cream together the sugar and butter until smooth and pale.

Add the eggs and mix until well combined.

Sift together the baking powder, 300g of flour, and salt.

Add the flour mixture to the egg and butter mixture, stirring well.

Knead a soft but not sticky dough, adding the remaining flour as needed.

Roll a third of the dough into a ball, wrap in plastic wrap, and freeze for 30 minutes.

Grease your baking pan, spread the main dough in it, even it out, and shape high sides.

Spread the jam evenly over the dough.

Grate the frozen dough portion on the coarse side of a box grater and scatter over the top.