Frozen onion is a versatile ingredient that can be used in a variety of dishes. It is a type of onion that has been frozen and can last longer than other types of onions. It has a milder flavor, making it a great option for those who don't like the strong flavor of raw onion. Frozen onion can be used in soups, salads, casseroles, and other dishes. It is also a great substitute for fresh onion, and it can be used in dishes that require onions to be cooked. Frozen onion is a convenient and economical option for those who use onions often in their cooking.