In a small bowl, dissolve yeast in warm water. In a large bowl, combine 1/4 cup oil, sugar, salt, yeast mixture and 2 cups flour; beat on medium speed until smooth. Stir in enough remaining flour to form a soft dough.
Turn dough onto a floured surface; knead until smooth and elastic, about 5 minutes. Place in a greased bowl, turning once to grease the top. Cover with plastic wrap and let rise in a warm place until doubled, about 40 minutes.
Punch dough down. Turn onto a lightly floured surface; divide in half. Pat each piece flat. Let rest 5 minutes. Roll out each portion into an 11-in. circle; place on greased baking sheets. Cover with kitchen towels; let rise in a warm place until almost doubled, about 40 minutes.
Preheat oven to 425°. Using the end of a wooden spoon handle, make several 1/4-in. indentations. Brush with remaining oil. In a small bowl, combine cheese, garlic salt and rosemary; sprinkle over dough. Bake 12-15 minutes or until golden brown. Remove from pans to wire racks to cool. Cut into wedges.