Plum vegetables. The shell steamed buns are opened directly from the joint and filled with vegetables or meat. The fat but not greasy pork belly and the soft texture of the steamed buns can leave diners with good memories. Shell buns are a kind of fancy pasta. They are simple and easy to make, delicious and easy to mix. They can be used as a dish or as a staple food. They are fluffy, soft and easy to digest.