Stir yeast into warm water and set aside for 5 to 10 minutes. Combine the flours and salt in a mixer bowl; add yeast mixture. Mix until dough begins to pull away from side of bowl. (Add a little more flour if dough sticks to side.) Divide dough in half. On a floured surface with floured rolling pin, roll each half into a 15-inch circle (dough should overlap pan by 1 inch all around). If dough resists rolling, let it rest a few minutes and try again. Dough can be refrigerated or frozen before rolling. Thaw thoroughly before attempting to roll out.

Coat two nonstick 14-inch pizza pans with cooking spray and sprinkle with cornmeal (optional). Arrange each crust in a prepared pan and top as desired.