1. Combine first 3 ingredients in a large wooden bowl. Press with the back of a spoon to make a paste. Stir in next 5 ingredients.
2. Whisk in 1/4 cup extra-virgin olive oil in a thin, steady stream. Continue to whisk to form a thick dressing. Stir in 2 tablespoons Parmesan cheese. Add romaine leaves, tossing to coat.
3. Arrange lettuce on 2 serving plates; sprinkle with cracked pepper and remaining 2 tablespoons Parmesan cheese, and serve with toasted baguette slices.