Layer the ingredients in this order, bottom-to-top, in a 9x13-inch dish: Beans, half the crushed Fritos, corn, Queso Blanco, lettuce (if using), cheese, salsa, remaining crushed Fritos. Refrigerate 30 minutes or up to 8 hours before serving.
16 oz. refried beans, 9¼ oz. Original Fritos, 11 oz. can corn, 15.5 oz. Tostitos Queso Blanco, 1 head iceberg or romaine lettuce, 2 cups shredded Mexican blend or cheddar cheese, 15.5 oz. Tostitos Chunky or Restaurant Style Salsa