I hate to say it, but my answer to fussy eaters has always been 'You're not hungry enough then.' I have no tolerance for folks who don't do the cooking getting shirty about what someone else cooks for them.

That said, I don't have to live through the sulking, since I can just send fussy eaters home if they get shirty with me.

So what about adding shallots and butter to the kidney beans? Or possibly something like smoke flavoring, or even barbecue sauce?