Yarrow is a popular plant with yellow flower heads. The leaves are often used in salads, soups, teas, and occasionally egg dishes. Also known as milfoil, its intense bitter, peppery, perfume-like flavour is best used in moderation. The most popular use appears to be Tea. To make it add honey to sweeten if desired or a slice of lemon. The leaves are also used in the flavouring of beer so got to be good.