Season chicken breasts with olive oil, salt, and pepper.
Grill or pan-sear chicken over medium-high heat for 5 to 7 minutes per side until the internal temperature reaches 165°F (74°C).
Transfer chicken to a cutting board and let rest for 5 minutes before chopping into 1/2-inch cubes.
Place chopped Romaine lettuce into a large mixing bowl.
Add the chopped chicken, croutons, and Parmesan cheese to the bowl.
Pour the Caesar dressing over the salad components.
Toss the salad thoroughly using tongs until all ingredients are evenly coated.
Serve immediately.