Celebrate National Hamburger Day by ordering or making yourself a huge, juicy burger with all the fixins. According to Wikipedia, the first American hamburger may have been invented by a guy named Louis Lassen. He “sandwiched a pattie between two pieces of white toast for a busy office worker in 1900”. The burgers were then flame broiled in the “original 1898 Bridge & Beach vertical cast iron gas stoves using locally patented steel wire gridirons to hold the hamburgers in place during cooking”. So thank you very, very much, Louis Lassen.