In a bowl. mix all the ingredients of the sourdough mix except for the water. Add enough of the water to give the mix similar to a thick batter. Cover and leave for 3 hours or more.

Heat the oven to 150ºC

Add in the remainder of the ingredients stir well with a spatula until evenly mixed.

Line a 30cm x 20cm baking tray with baking paper. Put the mix in the tray and form in to a level square about 2 cm deep.

Bake in the oven for 25 minutes.

As soon as the tray comes out the oven, use a metal dough scraper to cut into bars. Start by slicing in half along the long length. Then cut into bars about 3cm wide. This should make about 9 to 10 cuts giving you a total of 18 to 20 bars.

Leave the bars to cool for 10 minutes after which lift the baking paper carefully onto a cooling rack.