Preheat your oven to 350F, and prep your pan with a silicon baking mat.
In a mixing bowl, thoroughly combine ground flax seeds, salt and whatever seasoning you'd like.
Stir in water, and let sit for about 5 minutes.
This should allow enough time for the water to be absorbed, and the flax to thicken into a dough.
Spread the dough out on your prepared pan evenly at a thickness of about 1/8 of an inch.
It's important that the dough is even so that it cooks all the way through.
Score into however many little pieces you want, being careful not to damage the mat or parchment.
Bake for about 50 minutes, though check at 45 to see how things are going.
You may need an additional 5 or so minutes, depending on the thickness, how many lines you scored, and how evenly your oven bakes, among other things.
Remove from the oven, let cool and break into pieces.
Make sure the pieces have cooled completely before storing them, or else too much humidity will get into the container.
These should keep for a week on the counter (realistically more, but I like being cautious).