My mom usually grinds the turkey ham in her food chopper so it is more coarsely ground, but if you don't have one, just finely dice it.
My mom likes to use a glass 9x13 pan for this dish but metal works too if that's what you have.
Use tortillas that are no larger than 6-7 inches. If you have bigger ones, you can trim them to the right size so that everyone's servings look the same. You may be able to get 9 servings from this recipe if you put one enchilada sideways int he pan.