Okay, it's apparently too late to Edit my OP, but please listen up!
I just did the recipe tonight - it's in the oven now - and after conferring with the wife I need to make a few amendments.
First of all, the recipe as written is for a smaller casserole dish. If you're using a large one, you're going to want to double the amounts on turkey, cheddar, cream of chicken soup (two cans instead of one), and evaporated milk. If you have a small can of green chilies, that's fine - use the whole thing. But if you've got one of those larger cans, don't try to stuff all the chilies into one recipe - 6 or 8 of those large pieces, cut into strips, is all you need. And bake it for a full hour.