Mix the flour, salt and yeast together in a big bowl
Add the water and mix well for a few minutes
Cover the bowl with clingfilm or a tea towel and leave in a warm spot for 12 hours
After about 12 hours, preheat your oven to 230 degrees
Flour your worktop, or a big baking tray, then scrape the sticky dough out onto the floured surface
Turn the dough a bit to get it all covered in the flour and then leave for 30 minutes
Here's the magic step that makes this never-ending bread - making a levain (or saved yeast) to use for your next loaf instead of new yeast. Pinch off a piece of the dough and mix it with a cup of flour and a cup of water in a bowl. Cover this loosely and leave on the worktop to use in a day or two.
Oil the loaf tin
After 30 minutes scoop the dough up and put it in the loaf tin. You'll have to be quick because the dough is really loose, not the firm dough you might expect for bread.
Cook in the oven for 45 minutes
Check it's done by tipping the bread out of the tin and tapping the bottom gently, it should sound hollow
Leave to cool and then enjoy!