Preheat oven to 400 degrees (approx 200 degrees Celsius). Slice the bread into 1″ slices and lay out on a sheet pan. Place the bread in the oven for 5 minutes per side. Rub the raw garlic on one side of the bread. In a large bowl, combine the roma tomatoes, olive oil, vinegar, basil, shallots, salt, and pepper. Allow the mixture to sit for 10 minutes. Divide the tomato mixture evenly over the bread slices and serve.