Also known as green onions, spring onions, yard onions, etc., there several different names for it. They are edible plants, similar to an onion in flavor, with hollow green leaves resembling giant chives. Scallions have a milder flavor than most onions and can be eaten raw or cooked. Most people enjoy raw scallions fresh in salads or on baked potatoes (I prefer the baked potato). Many recipes gives you the option to substitute the scallions for the chives. Scallions can be a great garnish to add a little green color to a lot of dishes (so you don't have to always rely on chopped parsley for a color on the plate).