In a large bowl, add your warm water and yeast. Let it sit for a few minutes until your yeast creates a foam on top of the liquid. If don't have a foam after a few minutes, start over. The foam means your yeast is activated and you'll have risen bread. Do NOT proceed until you have a foam. Your water should be the warmth of what you would put in a baby bottle. Too cold and it won't activate your yeast. Too hot and it will kill your yeast.
Add in your salt and your flour. Mix until you have a sticky dough. Set aside and let rise for 2-3 hours or until it's doubled in volume.
Place your dutch oven with a lid on into your oven. Preheat the oven to 425°.
Form your dough into a ball. It's okay if its still a bit sticky. Place the dough ball onto a piece of parchment paper.
Open the oven and carefully take the lid off your dutch oven (don't forget to use a mitt!). Place the parchment paper with dough into the dutch oven and put the lid back on top. Close the oven and bake for 35 minutes.
Remove the lid after 35 minutes and bake an additional 5-10 minutes or until the top is golden brown. Take out and enjoy!