Line a cookie
sheet with parchment paper. Mix the flour, sugar,
egg whites, almonds, candied lemon peel, lemon zest,
baking soda, and salt in a large bowl to form a
stiff dough.
Press the dough into a disk, wrap in
plastic wrap, and refrigerate for 30 minutes.
Roll
out the dough on a lightly floured surface to a 12 x
3-inch (30 x 8-cm) rectangle. Transfer to the
prepared cookie sheet and refrigerate for 30
minutes.
Preheat the oven to 300°F/150°C/gas 2. Cut the dough in half lengthwise and slice into
1/2-inch (1-cm) strips.
Bake for 10-15 minutes, or
until just golden. Transfer to racks to cool.