Crostata di marmellata

In a large bowl, combine the 00 flour, granulated sugar, and salt.

Add the cold, cubed unsalted butter to the dry ingredients. Work quickly with your fingertips to rub the butter into the flour mixture until it resembles coarse breadcrumbs.

Add the egg yolks and lemon zest to the mixture. Mix gently until a dough just begins to form, being careful not to overwork it.