Method

1. 1 Preheat the oven 180c. Add some flour to lightly coat a baking tray.
2. 2 Sieve the flour into a mixing bowl.
3. 3 Measure in the seaweed, bicarbonate of soda and salt. Mix well.
4. 4 Add the buttermilk and work into the flour with a fork. The dough should feel soft but not sticky. If the mix is too wet add a spoon of flour or if it's too dry add another drop of buttermilk
5. 5 Turn the dough on to the work top and use your hand to gently work the dough. 
6. 6 Shape it into a smooth round. Put it on the floured tray, flatten the round with the palm of your hand
7. 7 Using a butter knife make the indent of a cross on top of the dough
8. 8 Bake in the oven for 50 mins or until there is a hollow sound when the bottom is tapped. 
9. 9 Cool on a wire rack.