Put flax seed meal, salt and a handful of seeds in a bowl. Mix well in a bowl and then add all the water in once. Stir immediately and fast. The dough is wet but very compact. It doesn't stick at the bowl.
Put it all on a baking sheet and roll it out to a slim paste (1/2 cm).
Cut it now with a wet pizza cutter in order to have pre-cut the pieces and they will break completely when dry.
Put it into the oven at 100°C for around 1.5 hours.
The drying time depends by how thick the dough is. Control from time in time. If it's dry on both sides than it's ready, if only on the top change sides and give another 15-20 minutes to the other side. At 100°C it can't burn, so don't worry too much to overdo.
As seeds you can use flax seeds, pumpkin seeds, sunflower seeds or what kind of seeds you like. You can also admit the seeds if you don't like them or have a digestion problem with them.
If you want a rustic taste add also some pepper and/or curcuma.