01 - Set oven temperature to 400°F.
02 - Slice top off garlic head to expose cloves, place on foil, drizzle with 1 teaspoon olive oil, wrap tightly, and roast for 30 minutes until cloves are soft and golden. Allow to cool slightly before squeezing cloves from skins and mashing into a paste.
03 - In a bowl, combine diced tomatoes, chopped basil, 2 tablespoons extra virgin olive oil, balsamic vinegar, salt, and black pepper. Stir gently and let marinate.
04 - Arrange baguette slices on a baking sheet and brush both sides with 2 tablespoons olive oil. Toast in oven for 8 to 10 minutes, flipping halfway, until golden and crisp.
05 - Spread a thin layer of roasted garlic paste onto each toasted baguette slice.
06 - Spoon the tomato mixture generously over each garlic-spread slice.
07 - Top with shaved Parmesan and additional basil leaves if desired and serve immediately.