Wash and thoroughly dry the romaine lettuce before chopping it into bite-sized pieces. Place in a large serving bowl.
Add the diced cooked chicken breast to the bowl with the lettuce.
Rinse and drain the black beans thoroughly, then add them to your salad bowl.
Add corn kernels to the bowl.
Sprinkle the shredded cheddar cheese evenly over the salad.
Add diced tomatoes to the bowl.
Just before serving, dice the avocado and gently fold it into the salad.
Drizzle ranch dressing over the salad and toss gently to combine all ingredients.
If using optional toppings like red onion, cilantro, tortilla strips, or cotija cheese, add these as a final layer.
Serve immediately with lime wedges on the side.
