Bring a large pot of salted water to a rolling boil and add the rotini pasta. Cook according to package instructions, typically 8-10 minutes, until al dente. Drain and rinse under cold water to stop the cooking process.

Dice or shred grilled chicken into bite-sized pieces. Use pre-cooked rotisserie chicken if preferred. Ensure chicken is at room temperature for optimal mixing.

In a large mixing bowl, combine the cooled rotini pasta, shredded chicken, and Caesar dressing. Gently fold until evenly coated.

Carefully fold in chopped romaine lettuce and freshly grated Parmesan cheese.

Just before serving, sprinkle croutons on top. Optionally drizzle with lemon juice. Serve immediately.