Heat oven to 425°F. Spray cookie sheets with cooking spray or oil lightly. In small bowl, combine water, yeast, oil and sugar; mix. Let stand 10 minutes or until foamy. In large bowl, combine flour and oats. Add yeast mixture; blend on low speed of electric mixer until dry ingredients are moistened. Increase speed to medium; beat 2 minutes. Turn dough out onto lightly floured surface. Knead 1 minute. Shape dough into ball; place in greased bowl, turning once. Cover; let rise in warm place 20 minutes or until nearly doubled in size. Punch dough down; divide into four portions. On cookie sheet, pat each portion of dough into 6-inch circle. Top with Parmesan cheese, 3/4 cup mozzarella cheese, bell pepper, onion, basil, garlic and tomatoes, in that order, dividing evenly. Sprinkle with remaining 3/4 cup mozzarella cheese. Bake 20 minutes or until crust is golden brown.