Add yeast and salt to warm water and mix them well.
Put the flour in a bowl and add the yeasty water to it and mix it up well with a wooden spoon.
Let that sit for 2 hours in the bowl covering it with a kitchen towel. It should double the size.
Preheat the oven at 450° F and put an empty Dutch oven in there and leave it for about 30 minutes.
In the meantime, form your loaf on a piece of parchment paper by pulling up the bottom on each side and putting it on top. Then, flip it over and drop it in your hot Dutch oven.
Bake for 35 minutes with the lid on and another 5 minutes with the lid off and it's ready to go!