Preheat oven to 350°.
Place the first 5 ingredients in a blender; process until smooth.
Place baguette slices in a single layer on a baking sheet. Bake at 350° for 7 minutes or until crisp. Spread 1/2 teaspoon cheese over each slice.
Divide tomatoes evenly among 4 salad plates. Drizzle each serving with 1 tablespoon herbed oil. Sprinkle each with 1/8 teaspoon salt and 1/8 teaspoon pepper. Garnish each with 2 crostini.