You really can't make a casserole any quicker than you can this one. I keep cooked chicken in the freezer in 2 cup batches just for dishes like this one. You can have this on the table in under an hour.
2In an 9-inch deep pie plate, layer 4 tortillas, 1 cup chicken, cup chiles, 1/2 cup salsa, 1/3 cup sour cream, and 1/2 cup cheese; repeat once. Top with remaining tortillas, salsa, sour cream, and cheese. Bake until top is browned and bubbling, 30 to 40 minutes.
312 corn tortillas (6-inch), toasted
2 cups cooked, shredded dark-meat chicken
1 can (4 ounces) chopped green chiles
1 1/2 cups Green or Red Salsa
1 cup sour cream
1 1/2 cups Monterey Jack cheese, shredded (6 ounces)