This is my all-time favorite. It can be made in a foil pan and frozen for up to 6 weeks.
Sour Cream Chicken Enchilada Casserole
1 can cream of chicken soup
1/2 can (cream of chicken size) milk
1 pint sour cream
1 small can diced green chiles
1 lb. shredded cheddar cheese (use as much as desired)
1 small can diced black olives (can be omitted)
3 scallions, chopped including greens
3 large half chicken breasts (boiled with some onion and ~10 black pepper corns. Remove from water, discard onion and pepper corns and shred or cut into 1/2-inch size pieces; or use purchased roasted chicken.. i.e. Costco, Ralphs, etc.)
1 dozen (+ or -) white corn tortillas
Combine the first four ingredients to make a sauce.
Layering:
In a 13X9-inch pan (spray with Pam or lightly oil), spread about 2/3 cup of sauce over the bottom. Place a layer of corn tortillas, filling in all sides. (I break in half and put flat sides in against the pan sides and then fill in middle with whole tortillas). Spread tortillas with 1/3 of remaining sauce. Top this layer with 1/2 of chicken, 1/3 of cheese, 1/3 of olives, and 1/3 of onions.
Top first (bottom) layer with tortillas and repeat as for first layer.
Top second (middle) layer with tortillas. Spread with remaining sauce. Add cheese, then onions, then olives (if used). I like to make a design out of the olives, but that's just me.
Baking Time: If baking immediately (or that day) 350F degrees for 35-45 minutes, or until sauce is bubbling and cheese has melted but not browned too much. If frozen, increase cooking time to 50-60 minutes and remove foil 1/2 way to prevent cheese from sticking to the foil. Let set for 15 minutes before serving so the sauce 'coagulates' as my husband calls it!
My family loves this so much. I made it for a new mommy just a month or so ago. She loved it so much she just served her friend (another new mommy) the same dinner!