It’s been one week since Cleveland dishwasher Charles Ramsey was at home eating a Big Mac when he heard a woman's scream and immediately began a viral transformation from unsuspecting neighbor to true-crime hero to backlash target to trend-story subject to bemused celebrity. And seven days later, his face is now permanently inked on the back of some dude's leg.

As part of McDonald's Canada's ongoing transparency campaign, the company's executive chef Dan Coudreaut responds to a customer's question about the Big Mac's "special sauce" by demonstrating how to make your own using commonly found ingredients.