Heat oven to 350 degrees F. Line bottom and sides of a 13 x 9 x 2-inch baking dish with tortilla chips. Scatter chicken and beans over the chips. Spoon salsa over the beans and top with cheese and scallions.
Bake at 350 degrees F. for 15 minutes until heated through and cheese is melted. Serve immediately.
Replace chicken and beans with 1/2 pound coarsely chopped cooked shrimp and 1 can (8 ounces) drained crushed pineapple.