Bun Cha is a traditional Vietnamese dish that is popular in Halong Bay. It consists of grilled pork patties, served with vermicelli noodles, fresh herbs, and a dipping sauce. The pork patties are marinated in a mixture of fish sauce, garlic, and other spices, and then grilled until they are charred and flavorful. The dish is typically served with a side of pickled vegetables and a bowl of fish sauce-based broth. The combination of the tender pork patties, the refreshing herbs, and the flavorful broth creates a harmonious and satisfying meal.