Layer 4 tortilla halves in bottom of baking dish. Top with 1/4 cup enchilada sauce and half of the chicken mixture. Top with 2 tortilla halves; fill in empty spaces with 3 tortilla strips. Spoon corn over tortillas. Spread salsa over corn. Layer with 2 tortilla halves and 3 strips. Top with remaining half of chicken mixture. Continue layering with remaining 2 tortilla halves and strips, enchilada sauce, cheese and 2 tablespoons green onions.