They served hot dogs and 'hamburgers' at the cookout.
Add the cooked 'hamburger' to the sauce.
(..) I see. Well, I suppose I'll be taking that milk steak to go then. Yeah. And so the Wendy's manager is all, “You gotta clean that up!” And I said, “They're your hamburgers. You clean 'em up.” And then Artemis got all bummed out... because of something I did with the onions to myself. (..)2009 TvShow: It's Always Sunny in Philadelphia Title: The Waitress Is Getting Married Season: 5 Episode 5