oh wait...that’s steak and mushrooms right? mmmmmmm.
Another one I have; after they ask, "How was your meal?" is...
After a furtive glance around; lean in a bit closer and say...
"Well; normally I wouldn't complain; but the meat: it tasted like flesh from a dead animal."
To my delight; she'll get a shocked look and say, "Would you like to speak to the manager?"