Chop the chicken, lettuce, and spinach; toss into a large bowl.
Dice cucumber, green onions, bell pepper, tomatoes (seeds may be removed if desired), avocado, and cilantro; drain and rinse corn and beans. Add to the chicken and greens. Drizzle with dressing and toss to combine. Spritz with fresh lime juice if desired.
Serve tortilla chips and apple slices on the side.