We get these locally every year, they call them Cabbage Collards here, because they actually do taste like both veggies. They have a slightly sweeter taste than old fashioned collards. They are also called yellow collards although I don't see a dang thing yellow about them do you?
Anyway, I am hooked on them over the old fashioned collards and if you ever get to try them or grow them you might be hooked too!! Happy Thanksgiving y'all!! Bon Appetit!