In a large bowl, combine flour, yeast, and salt.
Add warm water and stir until it forms a shaggy dough. The dough will be sticky.
Cover bowl with plastic wrap and let dough rest at room temperature for at least 2 hours, until dough has doubled in size.
Preheat oven to 450°F and place a Dutch oven or heavy pot in oven as it heats.
Once dough is ready, turn it out onto a well-floured surface. Shape it into a round loaf.
Carefully remove the pot from the oven. Place dough into the pot and cover with lid.
Bake covered for 30 minutes, then uncover and bake for an additional 15 minutes, until crust is golden and crisp.
Remove bread from pot and let it cool on a wire rack.