Preheat oven to 375 degrees.
In a small bowl mix together ranch dressing mix, parmesan cheese, and panko bread crumbs.
In another small bowl crack and lightly beat the egg.
Dip each of the chicken breasts in the egg then in the ranch and parmesan mixture. Place on a baking sheet coated with cooking spray and bake for 40- 50 minutes or until the chicken is cooked throughly and juices run clear.
Let the chicken cool and then chop into bite size pieces. Set aside.
In a large bowl mix together romaine hearts, cherry tomatoes, bell pepper, chickpeas, red onion, and avocado.
Pour ranch dressing over the top and mix it into the ingredients until everything is coated with the dressing.
Slowly mix in the chicken breast.
Sprinkle grated parmesan and doritos over top and serve.