01 - Heat grill or grill pan to medium-high temperature.
02 - Rub chicken breasts with olive oil, garlic powder, dried Italian herbs, salt, and black pepper.
03 - Cook chicken for 6 to 7 minutes per side until fully cooked and juices run clear. Transfer to a plate and rest for 5 minutes before slicing thinly.
04 - Combine mayonnaise, lemon juice, Dijon mustard, Worcestershire sauce, minced garlic, anchovies, Parmesan cheese, salt, and pepper in a bowl and whisk until smooth. Adjust seasoning to taste.
05 - Place chopped romaine lettuce in a large bowl. Add croutons and Parmesan cheese.
06 - Drizzle half of the dressing over the salad and toss gently to coat evenly.
07 - Arrange sliced grilled chicken atop the salad and drizzle with remaining dressing if desired.
08 - Serve immediately, garnished with extra Parmesan cheese and freshly ground black pepper.