With the back of a knife, pound each slice of beef lightly to tenderize it. In a bowl combine the remaining ingredients. The mixture should have thick consistency. Add the marinade to the meat and mix well with your hands, making sure each piece is coated. Cover with plastic and let sit for at least 1 hour.
Cook the beef in one layer on a tabletop hibachi. The meat should be well done, and the outside caramelized. In a bowl, combine sugar and kochujang. Pour sesame oil over the mixture. Serve the beef with green leaf lettuce and the kochujang mixture.