Lau er khosha bata is a traditional Bengali chutney made from bottle gourd peels. It is a flavorful and tangy condiment that pairs well with rice or roti. The peels are roasted and ground with spices like mustard seeds, green chilies, and garlic, giving it a unique and delicious taste. This chutney is not only tasty but also packed with nutrients, as bottle gourd peels are rich in fiber and vitamins.