Long-time Fidelity Magellan Fund manager and all around stock guru Peter Lynch has consistently preached the "Buy what you know" mentality to retail investors. This statement got me thinking: what does a 23 year-old recent college grad know? The first thing that came to mind was fast food. Long nights, whether studying or spending time with friends, typically ended in a Baconator from The Wendy's Co (NASDAQ:WEN) or a couple of double cheeseburgers from McDonald's Corporation (NYSE:MCD). These fast food places were usually slammed with customers at all hours of the day. They have to be producing some nice profits right? Let's evaluate the big three burger chains, McDonald's Corporation (NYSE:MCD), Burger King Worldwide Inc (NYSE:BKW), and Wendy's and see if these companies meet the criteria of companies we would like to own. Serving up value since 1940 It's no secret that McDonald's Corporation (NYSE:MCD) is top dog in this industry.