Savory scallions (also known as “spring onions”) are a favorite early-season vegetable that is typically available all summer long. Both the greens and the white bulbous ends are edible. Consider chopping them finely to use as a garnish, or lightly cook the white, firmer part in any dish that calls for a crisp, oniony bite. Cleaned, wrapped in a damp paper towel, and stored in a bag in the fridge, scallions will stay fresh for a few days. Find them in specialty shops and farmers’ markets.