Preheat oven to 375 F (190 C).
Spray a 9X13 baking pan with non stick cooking spray.
Cut chicken breasts in half lengthwise so you have 6 thin chicken breasts. Place chicken in a single layer in the baking dish.
Sprinkle chicken with taco seasoning. Pour salsa over chicken. I used medium salsa and it was not too spicy for my little ones.
Bake for 20-30 minutes or until juices run clear.
Sprinkle with cheese (I used colby jack) and bake an additional 3 minutes or until cheese is nice and melted.
