There are many versions of Mexican lasagnas, but most of them contain ground beef. I like this version because it contains chicken and uses a green enchilada sauce instead of the basic red one.
This is my personal rendition on a favorite from Quebec. The addition of pumpkin to ordinary mashed potatoes gives them an nice earthiness that goes well with roasted poultry or other autumnal fare. I have not tried it with canned pumpkin but will experiment eventually. Though I don't cook much with butter, you should feel free to add some more to suit your taste.