Here's a simple, great-tasting burger from a small yet beloved Tennessee-based hamburger chain famous for its quirky buildings, tasty food, and "Sudden Service." Established in 1956 by Pal Barger, this twenty-one-unit fast-service chain accepted the Malcolm Baldrige National Quality Award from President George W. Bush and has performed admirably in markets among huge chains such as McDonald's, Burger King, and Wendy's. The signature sandwich from this little drive-thru comes slathered with a simple sauce - a combination of ketchup, mustard and relish - that makes quick production of scores of these tasty burgers a breeze when the line of cars grows long, as it often does.