Freezing cilantro is a great way to preserve the often abundant harvest one can get from this biennial herb (not to mention its unique flavor!). There are two easy ways to freeze cilantro:
1. Simply double-bag the cilantro, pushing out as much air from the bags as possible, and pop it in the freezer. Pop off the leaves you want to use (frozen cilantro is best used in things where its appearance is not of paramount importance - that is, it works better in dishes where it gets cooked than used as garnish).
2. Whirl the cilantro in a blender with enough water or olive oil to make a thick puree. Freeze this in small covered containers or in a clean ice cube tray. Once frozen through, transfer the cilantro cubes to a sealable plastic bag for long-term storage. Plop a cilantro cube directly into soups or stews for a burst of fresh herb-iness as the mood strikes you.