In a large bowl, dissolve yeast in warm water. Using a rubber spatula, stir in 3-1/2 cups flour and salt to form a soft, sticky dough. Do not knead. Cover and let rise at room temperature 1 hour., Stir down dough (dough will be sticky). Turn onto a floured surface; with floured hands pat into a 9-in. square. Fold square into thirds, forming a 9x3-in. rectangle. Fold rectangle into thirds, forming a 3-in. square. Place in a large greased bowl, turning once to grease the top. Cover and let rise at room temperature until almost doubled, about 1 hour., Punch down dough and repeat folding process. Return dough to bowl; refrigerate, covered, overnight., Grease the bottom of a disposable foil roasting pan with sides at least 4 in. high; dust pan with cornmeal. Turn dough onto a floured surface. Knead gently 6-8 times; shape into a 6-in. round loaf. Place into prepared pan; dust top with remaining 1 tablespoon flour. Cover pan and let rise at room temperature until dough expands to a 7-1/2-in. loaf, about 1-1/4 hours. , Preheat oven to 500°. Using a sharp knife, make a slash (1/4 in. deep) across top of loaf. Cover pan tightly with foil. Bake on lowest oven rack 25 minutes., Reduce oven setting to 450°. Remove foil; bake bread until deep golden brown, 25-30 minutes. Remove loaf to a wire rack to cool.