Make the Caesar salad dressing here. (It makes more than you need for the salad; you'll use ⅓ cup for the salad.) Cover and refrigerate.
Cook the chicken breasts using your favorite method. (Try baked chicken breast!) Rest for 5 minutes, then slice against the grain.
Toss together the romaine lettuce, grape tomatoes (if using), cooked chicken, and parmesan cheese.
Top with croutons, drizzle dressing on top, then toss again.