Heat oven to 450°F.
Coat baking sheet with nonstick spray. Place frozen potatoes on sheet.
Bake in 450°F oven until crisp and browned, about 25 minutes.
Place cooked waffle fries on a large microwave-safe platter. Scatter with shredded chicken. Spoon cheesey salsa over chicken.
Microwave on high power until all layers are heated through, about 4 minutes.