Combine the dry ingredients (flour, sugar, ground almonds, poppy seeds, baking powder and baking soda) together in a bowl.
Combine the zest, egg, egg whites and extract in a second bowl. Add the dry mixture and mix well. Form the dough into 2 logs each 8-9 inches long.
Place logs onto a cookie sheet lined with parchment paper. Bake for 30 minutes. Let cool slightly and cut diagonally into 1/2 inch slices. Put cut slices soft sides down back on the cookie sheets and bake slices another 8 to 10 minutes until dry.
Cool completely and store in an airtight container.