Bánh mì cá mòi is a traditional bánh mì sandwich variety made with sardines as the main ingredient. The sandwich is typically made with canned sardines that are packed in a slightly spicy tomato sauce. The sardines are mashed into a split bánh mì roll that has been smeared with mayonnaise, and the sandwich is then topped with classic accompaniments such as pickled carrots and daikon, coriander, sliced chili peppers, and a drizzle of soy sauce, fish sauce, or Maggi seasoning for a hit of umami.