In a 9 x 13" pan, layer the Tostitos on the bottom. Mix ground beef, soup, evaporated milk, green chilies and enchilada sauce together and cook until bubbly. Pour over Tostito chips. Sprinkle grated cheddar cheese over the top. Bake at 350 degrees for 15 - 20 minutes until bubbly. ENJOY!!
I add the green chilies and it does not make this casserole too spicey as we don't like real spicey food. Just an added flavor but it can be omitted.