Whisk water, yeast, and honey in a large bowl; stand 5 minutes until foamy.
Stir in flour, 1 cup cornmeal, and salt with wooden spoon until combined into sticky dough. Cover with plastic wrap; rise at room temperature 2 hours until doubled.
Butter two 1-quart oven-safe bowls; dust with remaining cornmeal. Divide dough between bowls; rise 30 minutes.
Preheat oven to 425°F; brush tops generously with melted butter.
Bake 15 minutes at 425°F; reduce to 375°F and bake another 30 minutes until tops are deep golden brown.
Turn onto cooling rack; cool at least 15 minutes before serving.