IC, I don't mind trying new stuff at all. It's just that I can think of several tastier things to do with green beans that have nothing to do with canned cream soup, and would be healthier, too.
Overall, I'm not fond of "creamed" veggies, and I don't like the canned creamed soups made up as soups, if only because they are horribly salty, so I guess I'm sort of predisposed to dislike this dish.
I didn't appreciate my mother's dig about "being creative" either, especially as she won't even be eating the casserole as she hates green beans.
Mother got tagged to bring the pies, which she is handling by ordering two pies from a restaurant known for its pies.
I don't mind being asked to bring a dish, but I do prefer knowing what the menu is, being asked to bring a "class" of dish (dessert, etc) and being able to choose what to bring within those parameters.
Oh well, part of this is probably colored by my general opinion of my brother in law, my sister's situation, including the marriage, and various other things.
I am not looking forward to the holiday this year at all.