Green onions, also known as scallions, are a type of onion with a mild, slightly sweet flavor and a crisp texture. They are a good source of vitamin K and vitamin C, as well as other beneficial plant compounds. Green onions can be eaten raw or cooked, and are commonly used in a variety of dishes such as salads, soups, stir-fries, and garnishes. They are easy to find in grocery stores year-round and are typically affordable. When selecting green onions, look for ones that are firm, with white or light-green bulbs and crisp, bright-green tops. Store them in the refrigerator in a plastic bag for up to a week. To prepare green onions, trim off the root end and any wilted or browned parts, and slice or chop as desired.