Classic Italian jam tart with a lattice top is the quintessential homemade dessert. This simple mediterranean crostata is a family baking tradition across every Italian region.
Combine flour, sugar, lemon zest, and salt in a large bowl. Add cold butter and quickly cut in with your fingertips until mixture forms coarse crumbs. Work quickly to keep butter cold for a tender crust.
Add eggs and vanilla extract to the bowl. Mix gently with a fork, then press dough together just until no dry flour remains — do not overwork.
Divide dough in two: form one larger disk (about 2/3 of dough) and one smaller. Wrap each in plastic wrap and chill in the refrigerator for 30 minutes.
On a lightly floured surface, roll out the larger dough disk to fit a 9-inch tart pan (about 1/8 inch thick). Line the pan and trim excess if needed.
Spread fruit jam evenly over the crust, leaving a small border at the edges.
Roll out the remaining dough and slice into thin strips. Arrange strips in a lattice over the top of the jam, gently pressing ends to adhere at the edges.
Bake in a preheated oven at 350°F (175°C) on the center rack for 30–35 minutes, until the crust is lightly golden and jam is bubbling.
Cool the crostata in the pan for 15 minutes on a wire rack before slicing. This ensures clean cuts and proper texture.