Begin by peeling an English cucumber, then slice it thinly using a sharp knife or a mandoline for uniformity. Pat the cucumber slices dry with paper towels.

In a medium mixing bowl, combine mayonnaise, lemon juice, Dijon mustard, and Worcestershire sauce. Whisk until smooth.

Add minced garlic and grated Parmesan cheese into the dressing mixture, continuing to whisk until fully incorporated.

Sprinkle in black pepper and salt to taste, and adjust the seasoning if needed.

If the dressing appears too thick, add water, one teaspoon at a time, whisking until the desired consistency is reached.

Combine the prepared cucumber slices with the dressing in a large bowl, tossing gently to coat.

Fold in croutons just before serving to maintain their crunch.

Transfer salad to a serving bowl, garnish with extra Parmesan and black pepper, and add protein if desired.

Serve immediately to enjoy the freshness.