In a large mixing bowl, combine yeast, water, and salt.
Add flour and mix with a wooden spoon until fully incorporated. The dough will be sticky.
Cover with plastic wrap and let rise at room temperature for 12-20 hours, until bubbly.
Turn the dough onto a lightly floured surface. Dust the top with flour.
Shape into a rectangle and cut into 4 equal pieces.
Gently roll each piece into a loaf about 10 inches long and 1½ inches in diameter.
Place on parchment-lined baking sheets that have been generously dusted with flour (2 loaves per pan).
Dust tops with flour and cover loosely with plastic wrap.
Let rise for 1-2 hours, until doubled.