Place the flours, oatmeal, bicarbonate of soda, sugar and 1 teaspoon of sea salt in a large bowl and mix together.
In a separate bowl, use a balloon whisk to beat the egg and buttermilk together.
Use a fork to stir the egg mixture into the flour, then as it starts to come together, use your hands to pat and bring the dough together.
Shape the dough into a ball and place onto a lightly floured baking tray. Use your hands to flatten the dough slightly so you end up with a disk, roughly 6 to 7cm thick.
Score a cross into the top of the bread with the blunt edge of a knife, then bake in the centre of the oven for 50 to 60 minutes, or until a firm crust has formed and it sounds hollow when tapped on the bottom.
Turn the bread out onto a wire rack to cool, then serve slightly warm with some soup or a nice wedge of cheese.
