Heat the soup and water in a 4-quart saucepan over medium-high heat to a boil
Stir in the cavatappi
Reduce the heat to medium
Cook for 12 minutes or until the cavatappi is tender, stirring occasionally
Add the cheeses and stir until melted
Cover and let stand for 2 minutes
While the cavatappi is cooking, heat the butter in an 8-inch skillet over medium heat
Add the panko and cook and stir for 2 minutes or until golden-brown
Stir the cavatappi mixture and season to taste with salt and pepper
Sprinkle with the panko mixture just before serving
