Gâteau Basque

Make a buttery dough with flour, almond flour, sugar, egg, lemon zest, and salt, then chill it.

Roll one portion into a round pan and spread pastry cream and black cherry jam inside.

Cover with the second dough round, seal the edges, and score a crisscross pattern on top.

Brush with egg wash and bake until deeply golden and set through.

Cool well before slicing so the cream and jam hold their layers.