Preheat oven to 325°F.
Toss tomatoes with oil, garlic, salt and pepper. Place on a baking sheet and roast until broken down, 45 to 55 minutes.
Combine the roasted tomatoes with basil and vinegar.
Top baguette slices with the roasted tomato mixture. Garnish with anchovy fillets, Kalamata olives or sliced fresh basil.