Heat the oven to 180/160fan/gas4. Whizz the oats in a food processor until quite fine, then add the remaining ingredients and mix until they become a dough.
Roll out the dough on a floured work surface to a 5mm thickness. Cut into squares or prefered biscuit shape and place on baking trays.
Bake for 15-20 mins or until pale golden and slightly firm. Remove from the oven and transfer to a wire rack to cool.