Mix the sifted flour with the sugar and the salt in a bowl
Grate the zest of a lemon directly over the flour mixture and mix
Add the room-temperature butter and rub the dry ingredients til a sandy consistency
Add the eggs and knead well until you get a homogeneous dough
Wrap the dough in cling film and put it in the fridge for at least 30 minutes
After rest, divide the dough visually into three equal parts. Cut one part and set it aside. It will be used for the stripes and squares, put it back in the fridge wrapped in cling film
Sprinkle some flour on the working surface and place the cold dough. Use a rolling pin to evenly roll 2/3 of the dough
Grease a baking dish with butter and dust it with flour. Gently lay it over and mold the dough to the baking dish
Use a fork to pierce the dough a few times and spread the jam evenly on top
Roll the remaining part and slice it into 0.5 inch thin
Lay strips diagonally on the tart, first in one way and then in the opposite one. Remove the extra shortcrust
Bake in the preheated roll at 360F for 35-40 min. Allow it to rest for about 20 minutes before serving it.