Nem Ran, also known as Vietnamese spring rolls, are a popular street food in Hanoi. They are made by wrapping a mixture of ground pork, shrimp, vegetables, and vermicelli noodles in rice paper and then deep-frying until crispy. Nem Ran is often served with a dipping sauce made from fish sauce, sugar, garlic, and chili. These crispy and flavorful spring rolls are a must-try in Hanoi.