01 -
Finely grate the Parmigiano-Reggiano cheese. Zest and juice half a lemon. Set the prepared ingredients aside.
02 -
In a medium bowl, whisk together mayonnaise, yellow mustard, anchovy paste, Worcestershire sauce, minced garlic, lemon juice, lemon zest, grated Parmigiano-Reggiano, and black pepper until smooth and well blended, approximately 1 to 2 minutes.
03 -
Taste and adjust seasoning to preference, adding more black pepper or lemon juice if needed.
04 -
Pour the dressing over chopped romaine lettuce and croutons, tossing gently until coated.
05 -
Transfer any leftover dressing to an airtight container and refrigerate for up to 7 days.