Wash and chop the romaine lettuce.
In a large bowl, combine the chopped lettuce, black beans, and corn.
Add halved cherry tomatoes to the bowl.
Gently toss the mixture to combine the ingredients.
Drizzle olive oil over the salad for added flavor.
Layer the sliced avocado on top of the salad.
Sprinkle shredded cheddar cheese evenly across the salad.
Add salsa generously over the top.
Top with crushed tortilla chips for crunch.
Serve with a dollop of sour cream on top.