In the mixing bowl add the warm water, yeast and sugar, stir with a whisk. Add 2 cups of the flour, salt, cornmeal and olive oil. Use the paddle and mix on speed 2 for 2 minutes. Put on the dough hook and add the remaining flour. Knead on speed 2 until the dough clings to the hook, then knead on speed 2 for 5 minutes longer. Place the dough in a greased bowl and cover. Let rise for 1 hour.
With oiled fingers press the dough into a deep-dish pizza pan. Cover the dough with the mozzarella, then top with the sausage. Place the tomatoes over the sausage. Top with the basil, oregano and Parmesan cheese. Bake in a 500° F oven for 15 minutes.
Reduce the heat to 350° F and bake for 20 minutes, or until the crust is brown.
Makes: 4