The green stems are the part of the chives that are used as an herb. Chive stems are hollow and are usually used fresh. Chives are typically chopped and can be used as a garnish, although they do have a mild oniony flavor, especially fresh ones.
Chives can be featured in all sorts of recipes, from
baked potatoes to soups, salads, sauces, and omelets. They're frequently mixed with cream cheese to make a savory spread. Chive butter, a compound butter made by blending chopped fresh chives into butter, is frequently served with grilled steaks or roasted poultry.