Preheat oven to 200°C.
Line and grease a 9" by 13" tray.
Mix all the seeds, salt and add water.
Mix until the dough is thick.
Transfer it to the tray and with the help of a spatula, spread it evenly to fit the whole tray.
Bake in the oven for one hour until the cracker feels dry to tough but retains a slight softness inside.
Remove the tray from oven.
Remove the cracker along with the paper from the tray.
Place another paper on the tray and flip the cracker on to this paper.
Gently remove the paper from the cracker.
With the help of a knife, slice it into 24 even crackers.
Now bake this again until the crackers are crisp without any trace of moisture in them.
Cool them on wire rack and store in airtight jar.
Enjoy!!