Combine flax meal + water, then whisk. Let sit for 10min, while water absorbs.
With a wooden spoon [seriously, use a wooden spoon!], mix in sugar, until just combined.
Stir in oil, until combined. [itâ€™s noticeable when the oil starts to incorporate with the other ingredients]
Stir in vanilla.
Stir baking soda into flour, and sift [if not pre-sifted flour].
Stir in flour in 3 increments, until fully combined. Batter will be very stiff. [similar to chocolate chip cookie dough] Add extra flour in 2T increments, if needed.
Stir in walnuts.
Pre-heat oven 350* + refrigerate dough for about 15mim.
Separate dough into 3 sections.
Spread around with the wooden spoon, into a oblong shape, until the dough is about 1/2â€ thick and about 6â€ at itâ€™s widest point. Make sure to keep a 2â€ clear space around the dough, to allow room for spreading.
Bake at 350* for about 30min, until golden brown.
Cut down the center, and then width-wise into ~1â€ width pieces. ~20 pieces
Flip on sides + bake for 5 more minutes.
Transfer to a cooling rack and allow to fully cool.
Store in foil and leave on the counter, or in a plastic bag. If not going to eat within 1 week, store in the freezer.