Cook peppers & onions for 3 min. over medium heat in a pan sprayed with nonstick spray.
In a large bowl, combine onions & peppers with turkey, corn, and seasoning mix. Spread half of the mixture evenly into the bottom of a loaf pan (about 9"x5") sprayed with nonstick spray.
Layer the two slices of fat-free cheese on top of the mixture (try to keep slices away from the pan's edges). Evenly top with the remaining meat mixture.
Pour the salsa over the top of the loaf. Cook in the oven for 30 min.
Top loaf with shredded cheese. Return loaf to the oven and cook for another 15 min.