01 - Preheat grill or grill pan to medium-high heat.
02 - Rub chicken breasts with olive oil, salt, pepper, and garlic powder, coating evenly.
03 - Grill chicken for 6-7 minutes per side until cooked through and juices run clear. Let rest 5 minutes, then slice thinly.
04 - Whisk together mayonnaise, Parmesan, lemon juice, Dijon, Worcestershire, and minced garlic in a small bowl until smooth.
05 - Butter the cut sides of the rolls and toast on grill or pan until golden brown.
06 - Spread Caesar dressing on each roll. Layer with shredded romaine, sliced chicken, shaved Parmesan, and cherry tomatoes. Close sandwiches, slice in half, and serve.