preheat oven to 375

spray bottom and sides of a 9 X 13 pan with Pam.

cook chicken and shred with forks.

add chicken and salsa to a large sauce pan and simmer until sauce is reduced by a third.

lay 3 tortillas in bottom of the pan

spread 1/3 of chicken over tortillas

spread 1/3 of cheese over the chicken

repeat two more times adding remainder of chicken and cheese to the top layer

place in the oven for 30 minutes or until cheese is golden brown