In a medium bowl, whisk together the garlic, anchovy paste, lemon juice, Dijon mustard and Worcestershire sauce. Add the mayonnaise, Parmigiano-Reggiano, salt and pepper and whisk until well combined. Taste and adjust the seasonings to your liking. The dressing will keep well in the fridge for about a week. Toss romaine with salad dressing, top with fresh croutons and grated parmesan cheese.