With a mixer, combine cheese, butter and salt on medium-high speed. Reduce speed to medium, slowly add flour, water and chia seed.
Continue mixing until dough is smooth.
Divide dough into two, creating discs and wrapping in plastic. Chill for at least 30 minutes.
Preheat oven to 180 for fan forced 200 for regular.
Roll out dough to 0.125cm thickness. Using a ruler as a guide, cut long 2.6 centimeters horizontal strips. Rotate ruler to slice vertically, creating 2.6cm squares. Carefully transfer individual squares to prepared baking sheet. Repeat process with remaining dough.
Using a toothpick or cake tester (I used a straw), create holes in the centre of each square.
Sprinkle with course salt or herbs.
Bake for 10-15 minutes. I removed mine at 12 minutes. The time will depend on the thickness of your squares as well as the crispness you prefer. Watch your oven closely from 10 minutes on.