In general, scallions are young onion plants harvested early before the plant matures and the bulb gets bigger. Scallions offer, colour, texture and a milder taste to a dish than that of an onion.
Store in a brown paper bag or perforated bag in the fridge where they should last about a week. Preparation is to wash in cold water and pat dry trim the roots and peel off 1-2 layers of outer thick leaves until you find white inner stalk. Chop the leaves as desired. Scallions are used in recipes to add a subtle onion flavour.
A typical 100g portion contains 32 calories, 7.34g carbohydrate, 1.83g protein and 0.3g fat.