In a large mixing bowl, combine the warm water, sugar, and yeast. Let it sit for about 5-10 minutes until it becomes frothy.
Add the flour and salt to the yeast mixture. Stir until a rough dough forms.
Turn the dough out onto a floured surface and knead for about 8-10 minutes until smooth and elastic.
Place the dough in a lightly greased bowl, cover with a damp cloth, and let it rise in a warm place for about 1-2 hours, or until it has doubled in size.
Once risen, punch down the dough and shape it into a round or oval loaf. Place it on a baking sheet dusted with cornmeal.
Cover the shaped loaf with a cloth and let it rise again for about 30-45 minutes.
Preheat your oven to 450°F. Place a shallow pan of water on the bottom rack to create steam.
Just before baking, make a few slashes on the top of the loaf with a sharp knife.
Bake the bread for 25-30 minutes or until the crust is golden brown and the loaf sounds hollow when tapped on the bottom.
Remove from the oven and let it cool on a wire rack before slicing.