Combine 2 cups of the flour, yeast, and the 1 1/2 teaspoons salt.
Add water and cooking oil.
Beat at low speed of electric mixer for 1/2 minute, scraping bowl.
Beat 3 minutes at high speed.
By hand, stir in enough of the remaining flour to make moderately stiff dough.
On floured surface, knead till smooth.
Place in greased bowl; turn once.
Cover; let rise till double (about 1 hour).
Cookthe 1 cup chopped onion and garlic in olive oil till onion is tender.
Add undrained tomatoes, tomato paste, basil, oregano, salt, sugar, and pepper.
Bring mixture to boiling; cover and simmer for 10 minutes.
Pat dough from center to edges in a greased 1 5 1/2 x 10 1/2 x1 -inch baking pan.
Cover; let rise 45 minutes.
Spoon sauce over dough.
Bake, uncovered, at 475° for 25 minutes.
Sprinkle pizza with the 1/2 cup onion and olives.
Top with green pepper; sprinkle mozzarella and Parmesan cheese over.
Bake 10 to 15 minutes longer.