Buffalo Chicken 'Shrooms (stuffed mushrooms) is one of those things that just sort of happened. You know, one of those check-out-what's-in-the-fridge and see-what-you-can-come-up-with kind of things. And sometimes, it turns into something worth writing down and sharing with you! This tasty appetizer can be made in a matter of minutes using leftover chicken (a grilled breast