Slice the beef thinly.
Cut the onion, green onion, carrot, and shiitake mushrooms.
Make the marinade with soy sauce, sugar, minced garlic, sesame oil, and pepper.
Mix the beef and vegetables with the marinade.
Put all the ingredients and broth into the earthen pot.
Place the pot over medium heat and bring to a boil.
Adjust the seasoning and simmer until cooked.