Add all the ingredients together in a large bowl. Mix until a dough forms.
Cover bowl with plastic wrap and allow the dough to rise to at least twice its size.
Pour the dough out onto a floured surface. Shape the loaf and place the seam side up on a floured piece of parchment paper.
Cover with a damp kitchen towel, and allow to rise in a warm place for about an hour.
Place your Dutch oven in the oven and preheat to 450ºF (230ºC).
When the dough is ready and the oven is hot, remove the dutch oven. Spray the inside with a vegetable spray and sprinkle corn flour to prevent the loaf sticking.
Roll the dough into the Dutch oven, cover and replace in the oven. Don't worry if your bread looks a bit deflated when it goes in the pot.
Bake for 30 minutes, then remove the lid and bake a few minutes longer to brown the top if necessary.
Remove, and place the loaf on a cooling rack and allow to cool.