Preheat oven to 350˚F.
Fit a silicone mat or parchment paper into sheet pan.
In a large bowl combine flour, cornmeal, baking powder, anise seeds and salt. Whisk together until incorporated.
In a small bowl whisk together flax meal and water until frothy (this is your "egg"). Add oil, vanilla, and lemon zest to water-flax mixture and whisk together until incorporated.
Add wet mixture to dry mixture and stir together with a rubber spatula. Fold in almonds. Dough should be stiff and form together into a ball.
Dust prepared sheet pan with flour and turn dough out onto sheet pan.
Form dough into a log about 2 1/2" wide by 11" long. Bake on middle rack for 25 minutes.
Remove from oven and allow to cool for 10 minutes.
Slice on diagonal into 1/2" thick slices. Arrange slices on sheet pan and return to oven to bake for an additional 10 minutes.
Remove from oven and transfer biscotti to cooling rack to cool to room temperature. Enjoy!