Raw banana peel chutney, also known as kanchakolar khosha bata, is a delicious and unique Bengali dish made from the discarded peels of raw bananas. The peels are boiled and then ground into a smooth paste with spices and herbs, resulting in a flavorful and tangy chutney. This chutney is a great way to reduce food waste and make use of every part of the banana. It can be served as a condiment with rice, roti, or as a spread on sandwiches.