Hard tack crackers

Mix the flour, water and salt and knead gently until smooth and cohesive.

Roll out nice and thin, dusting with additional flour, trim the edges and cut into squares; roll out the scraps too.

Cut shallow X-shaped scores into each square for easy portioning.

Set the squares on a parchment lined baking sheet and dry in an oven as low as it will go for two to three hours, until the bread is completely dry.