Leek is common vegetable used in cuisines around the world. A bundle of leafs is the edible part of the plant that’s often mistakenly known as a stem. Historically there are many different names for the leek and this one comes from old English.
It’s the same family of plant as are the onions and garlics. They have a mild taste and are thus used in salads and fried to add a punchy taste to the dish. They are grown in Texas and throughout the US both commercially and in some gardens.