Sift the flour
and salt into a large bowl. Cut in the butter
until the mixture resembles fine crumbs.
Stir in
the granulated sugar, lemon zest and juice, and egg
yolks to form a stiff dough. Press the dough into
a disk, wrap in plastic wrap, and refrigerate for 30
minutes.
Preheat the oven to 350°F/180°C/gas 4. Butter two cookie sheets. Roll out the dough to a
thickness of 1/8 inch (3 mm).
Use a 3-inch (8-cm)
fluted cookie cutter to cut out the cookies. Use a
1-inch (2.5-cm) crescent-shaped cookie cutter to cut
out the centers from half the cookies.
Gather the
dough scraps, re-roll, and continue cutting out
cookies until all the dough is used.
Transfer the
cookies to the sheets. Bake for 6-8 minutes, or
until golden brown. Transfer to racks to cool.
Spread the whole cookies with the lemon curd and
place the cookies with holes on top. Dust with the
confectioners' sugar.