Prepare the Dressing:
In a small bowl or blender, combine egg yolk (or mayo), Dijon mustard, lemon juice, Worcestershire sauce, garlic, and anchovies.
Slowly drizzle in the olive oil while whisking constantly until the dressing emulsifies (becomes thick and smooth).
Stir in optional grated Parmesan. Season with salt and pepper to taste. Set aside.
Make (or Toast) the Croutons (Optional):
If making homemade croutons: Cube stale bread, toss with olive oil, garlic powder, salt, and bake at 375°F (190°C) for 10–12 minutes or until golden and crisp.
Assemble the Salad:
In a large salad bowl, add the chopped romaine.
Add croutons and sprinkle Parmesan cheese over the top.
Drizzle with dressing and toss well to coat all ingredients evenly.
Serve:
Plate the salad and top with extra Parmesan and freshly ground pepper if desired.
Serve immediately while fresh and crisp.