In a large bowl, whisk three cups of flour with the salt and yeast.
Gradually add the warm water and mix until it comes together in a cohesive ball. If it's too wet, try adding additional flour. It should still be rather sticky though.
Cover the bowl with plastic wrap and let it rest for 8-24 hours.
When you're ready to bake the bread, turn out the dough onto a well-floured surface and cover with a clean dish towel. Let the loaf rise for about 30 minutes in a warm place if possible.
Meanwhile, preheat the oven to 450 degrees Fahrenheit. Place a baking dish with high sides in the oven to preheat as well.
Remove the dish and grease with olive oil before placing the dough inside.
Use a bread lame or sharp knife to cut an "X" in the top of the bread, about a half inch to an inch deep.
Cover and bake for 30 minutes.
Then remove the cover and continue baking for 10-15 minutes or until the top is golden brown.