Mix all of the ingredients (apart from the extra flour for sprinkling) well in a very large bowl. Use a spatula and/or clean hands to form a dough, making sure there's no dry flour left at the bottom of the bowl.
2
Cover with clingfilm or baking paper and leave over night (8 - 12 hours).
3
In the morning, the dough should have doubled in size (maybe more) and look bubbly.
4
Preheat your oven as hot as it will go (probably about 220C) and pop your lidded dish into the oven.
5
Allow the dish to preheat for 30 minutes.
6
Lay a baking paper sheet onto your worksurface and sprinkle with a little extra flour.
7
When the pan is very hot, carefully remove from the oven and take the lid off.
8
Carefully tip your dough out onto the baking paper (you may need to scrape the edges of the bowl to release it).
9
Gently ease the bread on the baking paper sheet into the very hot tin. Be careful not to touch the pan! Try not to touch the dough too much as it will be very sticky.
10
Bake for 30 minutes with the lid on, then remove the lid and bake for a further 30 minutes or until the bottom of the bread, when tipped out and tapped, sounds hollow.