In a mixing bowl combine the tomatoes, basil, garlic, oregano, chilli flakes, salt, pepper and olive oil. Use more olive oil if necessary to coat the entire mixture. Allow the mixture to sit for 10 minutes.
Slice the bread. On a baking tray arrange the slices in a single layer. Brown both sides of the bread slightly in the oven under the grill. Remove the slices from the oven.
Spread the tomato mixture on the slices. Grill for 2 to 3 minutes or until the mixture is hot but not cooked.