Place the ricotta in a fine mesh sieve over a medium bowl. Line the mesh sieve with cheesecloth or a couple of layers of paper towel. Place the ricotta into the paper towel and allow to drain at room temperature for 1 hour.
Make the pastry. In a standing mixer, combine flour, sugar, lemon zest, salt and baking powder. Turn on the machine and allow the ingredients to combine. With the machine running, slowly add the butter pieces allowing them to break up into the flour. Once the butter pieces are crumbled, add the vanilla paste and eggs. Continue to mix to allow all the ingredients to come together. Add a few tablespoons of water if needed to form the dough. Remove the dough from the machine onto a flour dusted surface. Flatten into a disc and cover with cling wrap. Refrigerate for one hour.
When ready to bake, preheat the oven to 350ºF and lightly butter a 9 ½-inch quiche dish. Set aside.
Make the filling. Mix ricotta, sugar, and extract together in a bowl until fully combined. Set aside.
Remove the dough from the fridge. Cut one piece, about ⅓ of the dough, and put the smaller piece back in the fridge. This dough will be used as the lattice topper. On a lightly floured board, roll out the larger piece of dough to a 12-inch diameter round. Place into the buttered, fluted quiche pan and press it to fit. Trim excess dough.
Spread the jam evenly over the bottom of the crostata.
Pour the cheese mix over it, careful not to mix it into the jam.
Roll out remaining dough into a large 10-inch round and cut five, one-inch strips. Place them on top to create a diamond shaped lattice.
Brush all the dough with egg wash and bake for 50 minutes until lightly golden and ricotta is set. Allow to cool completely before slicing.
