Instructions

1. 1
   Combine the flour, cinnamon, and baking powder.
2. 2
   Combine the egg, sugar, and lemon zest. Whip until very foamy.
3. 3
   Stir the flour mixture and almonds into the egg mixture to get a dough.
4. 4
   Shape the dough into two flattened logs of about 6 x 3 cm on a parchment-lined baking sheet.
5. 5
   Brush the dough with the beaten egg.
6. 6
   Bake in the oven at moderate heat (180°C) for 25 minutes.
7. 7
   While still hot, cut the baked dough into thin slices less than 1 cm thick. Arrange slices on baking sheets without letting them touch.
8. 8
   Bake them for 5 minutes more in the oven to brown their surfaces.
9. 9
   Allow to cool before eating.