Cut the fillet steak into thin slices and
beat until flat. Then arrange the flattened fillet steak in a single
layer on a dish. Sprinkle with garlic, leek and scallion. Use a bowl to
mix the soy sauce, sugar, chili sauce and sesame oil. Spoon the mixture
over the beef. Marinate the meat for 3 hours or longer in the fridge.
Heat up a wok with the peanut oil and fry the beef slices when it is
very hot. Fry a few sliced at a time for only a few seconds. Serve hot
immediately with steamed rice and bulgogi sauce to be dipped.