Preheat oven to broil
Spray a foil lined cookie sheet with cooking spray
Mix the 1/4 cup of olive oil and Balsamic vinegar in a bowl and add salt and pepper to taste
Add the chopped tomatoes, chopped garlic, and basil to the oil and vinegar mixture. Stir and set aside for 10 minutes or more
Slice the bread into serving size and brush with olive oil, sprinkle with parm cheese, and then top with mozzarella cheese.
Place the bread on the cookie sheet and broil for 5 minutes or until the cheese melts.
Remove from oven and place on serving plate.
Use a slotted spoon to place the tomato mixture on the melted cheese and serve.