Vegetarian burgers offer a delicious twist on the classic sandwich from Hamburg, Germany (1891). These burgers use meat substitutes like mushrooms, grains, or soy and can be enjoyed plain or with toppings and sauces. Popular condiments include mayonnaise, mustard, ketchup, barbecue sauce, or relish, but for the best flavor, try it without sauce first!

Toppings: Cheese, tomatoes, lettuce, jalapeños, onions, or pickles add texture and taste.

Fun Facts:

• The fast-food revolution began with White Castle in 1921 in Wichita, Kansas, selling "sliders" for 5 cents. Its founders focused on cleanliness to rebuild public trust in the meat industry after Upton Sinclair's The Jungle.

• White Castle featured white buildings, stainless steel doors, and uniformed staff to symbolize sanitation and quality.