In a 13x9-in baking dish. spread 1/2 c Roasted Tomatillo Salsa. Then layer 6 tortillas to cover the bottom of the dish, overlapping a bit and going up the sides. Then add half the chicken, 1 c salsa, and 1 c cheese. Repeat layering 6 tortillas, the remaining chicken, 1 c salsa, and 1 c cheese. Top with the remaining 6 tortillas, 1/2 c salsa, and 1 c cheese.