Brush olive oil over the dough. Combine the dried basil, oregano and garlic powder in small bowl and sprinkle over dough. Bake in oven for 10 minutes at 425 degrees. 

Take out of the oven and arrange sliced onion and chopped tomatoes over the crust. Sprinkle the 3 cheeses over the top. Bake 8-10 minutes or until golden brown.