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"If you didn&amp;#039;t have a hamburger over the holiday weekend, maybe you should consider enjoying one today. It is, after all, National Hamburger Day.   In 2010, Americans consumed an average of 30 pounds of hamburger meat each, but how did we become a burger nation? Well, that story is believed to begin more than a century ago, but the exact details are still unclear. Adam Kuban offers three potential theories in his article on A Hamburger Today. The first: At the turn of the 20th century, a New Haven luncheonette owner was tasked with creating a quick grab-and-go meal for a customer. The owner, Louis Lassen, broiled up a beef patty and put it between two slices of bread, giving birth to the hamburger. More From Delish: $325,000 Lab Burger is Close to Completion The second theory, Kuban explains, is set at a summer fair in Seymour, Wisconsin. Charlie Nagreen, at the age of 15, started selling meatballs. Unsuccessful in his mission, he decided he should smash the meatballs between two slices of bread. He supposedly called his invention a &amp;quot;hamburger.&amp;quot; The final theory comes from Ohio, home of the Menches brothers, owners of Menches Bros., who say their great-grandfather and great-granduncle invented the burger in Hamburg, Germany, in 1885. &amp;#039; More From Delish: The 25 Best Burgers in the U.S. While the true history of the hamburger&amp;#039;s birth may never be known, Americans are certainly glad that it was invented. Here are some other fun facts about the favored summer food: - Thirty-two percent of Americans prefer American cheese on the burger. - As far as the bun, 31 percent favor a potato roll while 23 percent want a sesame bun. - We use 12 million tons of ketchup per year (that&amp;#039;s $901 million worth) on our burgers and we eat 7.4 billion pounds of onions a year. - The world&amp;#039;s most expensive burger is currently on the market for $666. Sold off of the 666 Burger (a food truck in New York City), according to Time, it&amp;#039;s a doozy with a Kobe beef patty wrapped in a gold leaf, foie gras, caviar, lobster, truffles, imported gruyere cheese, kopi luwak barbecue sauce, and Himalayan rock salt. How will you enjoy your burger today? Find more great food content on Delish:   Search for the perfect recipe from our homepage Find out the latest food news Get a recipe book to save your favorite dishes Sign up for our free newsletters Check us out on Facebook, Pinterest, and Twitter  "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.delish.com/food/news/a39287/national-hamburger-day-may-28-2013/>