A recipe tester has had great success using flaxseed meal in place of the egg. She said she actually preferred it, and the texture was more "cracker-like".To replace the egg with flaxseed meal combine 1 tablespoon of ground flaxseeds with 3 tablespoons of water. Soak for a few minutes and then add to the batter.The more you bake them, the crunchier they will be.
Combine the flour and salt in a bowl and blend well.
Add the egg and oil, and blend and shape the mixture into two balls of dough.
Place each dough ball on a non-stick baking mat, then place a piece of parchment paper (or other non-stick mat) over the ball and roll the dough into a thin layer.
Score the crackers with a pizza cutter and sprinkle extra sea salt lightly across the cracker sheet.
Bake for about 15 minutes, or until they start to lightly brown.
Cool for about 15 minutes and break apart into crackers. Store in a sealed container.