If you’re short on time, skip flattening and cooking chicken breasts. Substitute 4 cups cubed cooked chicken; add with the salsa and corn in step 3.
If you have leftovers, serve them the next day as a Mini Tortilla-Topped Snack. Just chop up leftover chicken; spoon chicken and vegetables into a large custard cup and refrigerate. To serve, microwave covered until hot and sprinkle with crushed tortilla chips.