Preheat the oven to 425 degrees. Place a pizza stone in the oven.
Combine the yeast and sugar in the warm water in a bowl. Stir to dissolve and let stand for 10 minutes. (This 10 minutes is a good time to prepare toppings.)
When the 10 minutes have elapsed, insert the blade attachment into your food processor. Add the flour and salt to the bowl of the processor.
With the food processor running, pour the yeast mixture through the feed tube and process for about 45 seconds, until the dough begins to gather into small balls.
Add the oil through the feed tube and process for about 60 more seconds. If the dough isn't forming a ball, add a tablespoon or two or water and continue to process.
Remove the ball of dough from the food processor bowl. Hand shape the dough into a disc and roll it into a 14 inch crust using a rolling pin.
Remove the pizza stone from the oven and sprinkle it with the cornmeal, if you're using it. Move the crust to the stone.
Use a fork to poke holes in the pizza crust and bake for 6 minutes.
After 6 minutes, carefully remove the pizza stone. Spread the crust with your choice of toppings.
Return the pizza to the oven and bake at 425 for 10 minutes, or until the rim of the crust is golden brown.