Arby’s set out to introduce a new kind of roast beef burger, one that’s surprisingly better-for-you, at least by fast food standards. The key difference is that it’s not made with greasy beef like a typical fast food burger. To bring that message to life, we teamed up with artist Phil Hansen, who created an unforgettable portrait of the Mona Lisa using nothing but greasy burger patties from the biggest fast food chains. The result was a striking visual metaphor and a video that quickly went viral. Sometimes, the best way to show what you’re not is to show it in all its greasy glory.