If the World Cup taught us anything, it is that it's a Norwegian world and we are all along to row. This sentiment extends to the OG of fast food breakfast sandwiches, McDonald's Egg McMuffin. Customize your Egg McMuffin with Canadian bacon or sausage by adding some lettuce, tomato, and onion, and you have a facsimile. The only thing you will have to recreate with a few packets of condiments is the McFeast sauce. What exactly is the McFeast sauce?