The primary ingredient in a traditional banh mi is Vietnamese baguette, which is a type of crusty bread. The banh mi sandwich is a fusion of French and Vietnamese cuisines, combining the light, airy texture of the baguette with a variety of flavorful fillings. Common ingredients include sliced meats (like pork, chicken, or beef), pickled vegetables, fresh herbs, and condiments such as mayonnaise or chili sauce. Banh mi is known for its contrast of textures and flavors, making it a popular street food in Vietnam and gaining popularity worldwide for its delicious, hearty taste.