Put all the ingredients into a mixing bowl together. Mix by hand until you have even consistency.
Form into a ball, cover and leave for 30 mins before rolling.
Pre-heat the oven to 160°C
Roll the dough to about 10mm thick. Use a cutter to cut the biscuit shape or or cut into oblongs with a pastry scraper. Use a fork to pierce a regular pattern on the biscuit.
Line a baking tray with baking paper and lift the cut biscuits with the pastry scraper and arrange the biscuits on the tray.
sprinkle lightly with sea salt
Bake at 160°C for 20 mins conventional oven. Depending on the evenness of your oven you may need to turn the tray 180° halfway through the baking.