Dissolve yeast in warm water in warmed bowl. Add salt, olive oil, and 2 1/2 cup flour.
Attach bowl and dough hook, turn to speed 2 and mix 1 minute. Continuing on speed 2, add remaining flour, 1/2 cup at a time, until dough clings to dough hook and cleans sides of bowl. Knead on speed 2 for 2 minutes.
Place in greased bowl, turning to grease top. Cover, let rise in warm place until doubled in bulk (about 1 hour). Punch dough down.
Brush 14 inch pizza pan with oil, sprinkle with cornmeal. Press dough across bottom of pan forming collar around edge to hold filling. Top with fillings and bake at 450°F for 15 to 20 minutes.