Grilled cheese is what I’ll always make, if I’m hungry for comfort food and don’t really want to cook.
Lately there have been lots of articles on using mayonnaise instead of butter, for grilled cheese. I want to try it, but I think I’d still want butter, too ;-)
http://www.thekitchn.com/should-you-fry-your-grilled-ch-144259
You don’t need the butter if you use real mayo (not the low-fat stuff).
Try Both!