1. Prepare the Chicken: Ensure your chicken is cooked and cooled. Chop or shred the chicken into bite-sized pieces. Aim for uniform pieces so they mix well with the other ingredients.

2. Chop the Vegetables: Dice your avocado, halve the cherry tomatoes, dice the cucumber, and finely dice the red onion. Chop the fresh cilantro. Place all these chopped ingredients into a large mixing bowl.

3. Combine Salad Components: Add the chopped chicken to the bowl with the prepared vegetables and cilantro.

4. Dress the Salad: Pour the ranch dressing and lime juice over the chicken and vegetable mixture. The lime juice adds a bright, zesty counterpoint to the creamy dressing.

5. Season and Mix: Gently toss all the ingredients together until everything is well combined and coated with the dressing. Season with salt and black pepper to taste. Start with a small amount and add more if needed.

6. Prepare the Greens: On your serving plates or in a large serving bowl, arrange the chopped mixed greens or romaine lettuce as a base.

7. Assemble and Serve: Spoon the chicken and avocado ranch mixture over the bed of greens. Serve immediately to enjoy the freshest flavors and textures.