2 tablespoons (and up to 3 tablespoons) Dijon mustard
1 tablespoon balsamic or red wine vinegar (balsamic makes it nice and rich)
1 teaspoon Worcestershire sauce
2 cloves fresh garlic, peeled
1/2 whole lemon, juiced
1/2 cup olive oil
1/4 cup freshly grated Parmesan
1 dash salt
Freshly ground black pepper
Hearts of romaine lettuce
Fresh Parmesan wedge
For the dressing: Place the anchovies into a blender or food processor. Throw in the Dijon mustard, vinegar, Worcestershire, garlic and lemon juice. Pulse the processor or blend on low speed for several seconds. Scrape down the sides.
With the food processor or blender on, drizzle the olive oil into the mixture in a small stream. Scrape down the sides. Add the Parmesan, salt and a generous grind of black pepper. Pulse the whole thing together and mix until thoroughly combined. Refrigerate the dressing for a few hours (it just gets better!) before using it on the salad.
For the salad: Wash and dry the hearts of romaine lettuce. Leave them whole. Use a vegetable peeler and shave off large, thin slices of Parmesan.
Drizzle about half of the dressing over the top of the hearts. Throw in a good handful of the Parmesan shavings. Give it a good initial toss, just so you can evaluate how much more dressing you need.