Slice the baguette into 1cm thick diagonal slices. Arrange the slices in a single layer on a baking tray. Brush both sides of each slice with the olive oil. Place tomato slices and a sprinkling of basil and oregano on the bread slices. Sprinkle the tomatoes, basil and oregano with the garlic powder and white pepper. Cover the tomato slices with slices of the mozzarella and provolone. Place more basil, oregano and tomato slices on top of the cheese.
Bake in the preheated oven for 7 to 10 minutes or until the cheese is bubbly.