Put in a blender or a food processor the almonds and 3/4 of the sugar.
Blend the almonds very briefly... you want the almonds to not be too fine.
Add the remaining sugar, the lemon zest and the cinnamon and fold.
Whip the egg whites and fold into the almonds.
Insert the almonds in a piping bag with a large star tip and make S or straight cookies on a baking pan. The cookies should be about 3 inches long.
Bake at 355F for about 15 minutes or until the cookies turn golden.