In a large mixing bowl, combine the cornmeal, salt, and just enough warm water to make a firm dough.
Set in a warm area for two days to ferment. Place the dough into either fresh or dried corn husks coated inside with oil, ensuring that the husk curls around the dough.
Place a second husk over the first and knot the ends together with twine or fold the ends under. Cook the ablo in a food steamer for 20 minutes, securely covered, over rapidly boiling water.