Vegetable buns are a great option for those who prefer a vegetarian or vegan filling in their steamed buns. These buns can be filled with a variety of vegetables such as cabbage, carrots, mushrooms, and tofu. The filling is typically seasoned with soy sauce, ginger, garlic, and other spices to enhance the flavors. Vegetable buns are a healthy and delicious choice, perfect for those looking for a meat-free alternative.