Mix the flax seed with the 2-½ tablespoons of water and set aside for about 5 minutes to gel.

In a large mixing bowl, combine and mix the dry ingredients. 

Make a well in the center and add the liquids, including the gelled flaxseed. Stir well to combine. 

Spray a 17-inch x 12-inch baking sheet with a non-stick cooking spray and spread the dough evenly on the pan patting firmly. 

Cut into 96 1-½ inch x 1 ½ inch squares and prick each square twice with a fork.

Sprinkle with salt if desired and bake at 325 degrees for 30 minutes or until golden brown and slightly crispy. Cool and break apart.