kosher salt and freshly ground black pepper (to taste)
For the Dressing: using a mortar and pestle, mash the capers and garlic together. Add the mustard, lemon juice, Parmesan cheese, Worcestershire sauce and oil, and mix to combine. Season with Kosher salt and freshly ground black pepper.
To assemble the sandwich, spread 1 tablespoon of dressing on one piece of bread and top with 2 romaine leaves. On the other piece of bread place the turkey. Place the two sandwich halves together and slice in half.
Helpful Tip: as an easy appetizer add a tablespoon of dressing into the bottom of a small mason jar and place a romaine lettuce leaf on top!