Related to the onion and leek, this fragrant herb has slender, vivid green, hollow stems. Chives have a mild onion flavor and are available fresh year-round. Look for those with a uniform green color and no signs of wilting or browning. Store in a plastic bag in the refrigerator up to a week. Fresh chives can be snipped with scissors to the desired length. They're delicious in many cooked dishes but should be added toward the end of the cooking time to retain their flavor. Both chives and their edible lavender flowers are a tasty and colorful addition to salads. Frozen and freeze-dried chives are also available in most supermarkets. Chives are a good source of vitamin A and also contain a fair amount of potassium and calcium.