After gearing up for St. Patrick's Day with parties and plenty of Guinness, we finally celebrated the actual holiday with plenty of food and drink, from corned beef and cabbage pizza to old-fashioned Irish bread and homemade Baileys. Oh, and how could we forget — McDonald's Shamrock Shakes! We may still be recovering from the madness, but in the meantime, we thought we'd see how much you've been paying attention to the happenings on Yum. Ready to take our quiz? Let's begin!