01 - Place a grill pan or skillet over medium-high heat and allow it to come to temperature.
02 - Brush chicken breasts with olive oil, then coat evenly with salt, black pepper, and garlic powder on both sides.
03 - Cook seasoned chicken for 6 to 7 minutes per side until internal temperature reaches 165°F. Remove from heat and let rest for 5 minutes before slicing into thin strips.
04 - Combine chopped romaine lettuce with Caesar dressing in a large mixing bowl, tossing thoroughly to coat. Add halved cherry tomatoes and sliced red onion if desired.
05 - Lay each tortilla flat and distribute dressed lettuce mixture evenly across all four. Top with sliced grilled chicken and sprinkle with grated Parmesan cheese.
06 - Sprinkle additional freshly ground black pepper over each wrap according to preference.
07 - Fold both sides of each tortilla inward, then roll tightly from bottom to top to form a secure cylinder shape.
08 - Cut each wrap in half diagonally and serve immediately, or wrap securely in foil for a portable meal option.