Typically, it's made with thinly sliced beef, onions, soy sauce, mirin (sweet rice wine), and dashi (Japanese soup stock). You'll want to simmer everything together until the beef is tender and the onions are soft and caramelized. Don't forget to top it off with some thinly sliced green onions and maybe a sprinkle of shichimi togarashi (Japanese seven spice) for an extra kick!
